Cool MateDuration vs Extent vs Period vs Span
When to use each in English, with meaning, register, and examples.
Duration
Top 2,000 (common)B2noun
Extent
Top 2,000 (common)B2noun
Period
Top 1,000 (very common)A1noun
Span
Top 2,000 (common)C1verb
Most common: Period
| Duration | Extent | Period | Span | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 /["/djuˈreɪʃn/"]/🇺🇸 /["/duˈreɪʃn/"]/ | 🇬🇧 /["/ɪkˈstent/"]/🇺🇸 /["/ɪkˈstent/"]/ | 🇬🇧 /["/ˈpɪəriəd/"]/🇺🇸 /["/ˈpɪriəd/"]/ | 🇬🇧 /["/spæn/","/spænz/","/spænd/","/ˈspænɪŋ/"]/🇺🇸 /["/spæn/","/spænz/","/spænd/","/ˈspænɪŋ/"]/ |
| Meaning | The length of time something lasts. | The degree or amount of something. | A length of time or the end of a sentence. | To stretch across or cover an area. |
| Example | The school was used as a hospital for the duration of the war. | The extent of the damage was greater than we initially thought. | We have a period for math today. | His acting career spanned 55 years. |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 2,000 (common) | Top 1,000 (very common) | Top 2,000 (common) |
| CEFR level | B2 | B2 | A1 | C1 |
| Part of speech | noun | noun | noun | verb |
| Collocations | brief, short, limited, decrease, reduce, shorten, for the duration (of), of… duration, throughout the duration of | full, greatest, maximum, reach, see, consider, in extent, to an extent, to a…extent, at something’s greatest extent, to a considerable extent, to a great extent, full, greatest, maximum, reach, see, consider, in extent, to an extent, to a…extent, at something’s greatest extent, to a considerable extent, to a great extent | extended, lengthy, long, cover, span, begin, begin, commence, elapse, costume, furniture, after a period, during the period, throughout the period, the beginning of a period, the start of a period, the end of a period, extended, lengthy, long, cover, span, begin, begin, commence, elapse, costume, furniture, after a period, during the period, throughout the period, the beginning of a period, the start of a period, the end of a period, extended, lengthy, long, cover, span, begin, begin, commence, elapse, costume, furniture, after a period, during the period, throughout the period, the beginning of a period, the start of a period, the end of a period, heavy, light, menstrual, have, start, miss, start, stop, last, cramps, pains | span a distance, span a period of time, span generations, span across, span the globe |
| Antonyms | moment, instant | limited, minimal, modest | moment, instant | contract, recede, shorten |
| Common mistakes | Confused with 'session', which refers to a specific meeting or period of activity., Using it incorrectly as a verb, e.g., 'to duration something.', Mixing it up with 'interval,' which refers to a break or pause rather than the length. | Using 'extent' as a verb rather than a noun., Confusing 'extent' with 'extent of' when referring to limits or boundaries., Overusing 'extent' when a simpler term like 'amount' would be clearer. | Confused with 'time period' as if it's one single word., Using 'period' instead of 'dot' when referring to a punctuation mark in some regions. | Confused with 'spend' in terms of time context., Used incorrectly in passive voice; 'spanned' should be used when something is already in the past., Misused in context; often used incorrectly as a synonym for 'cover' or 'contain'. |
| Usage notes | Commonly used in both formal and informal contexts. Refers to time periods, such as how long a movie is or how long an event lasts. Avoid using it in very casual conversations. | Use 'extent' in formal or written contexts when discussing levels or degrees. It's less common in everyday speech. | Use 'period' when discussing time frames or in writing to indicate the end of a sentence. Avoid in very informal contexts or when discussing less standard uses like 'menstrual period' unless relevant. | Use 'span' to describe distance, duration, or extent. More common in technical or descriptive contexts. Avoid in very casual conversation. |
Frequently asked questions: Duration vs Extent vs Period vs Span
What's the difference between Duration, Extent, Period, and Span?
Duration: The length of time something lasts. Extent: The degree or amount of something. Period: A length of time or the end of a sentence. Span: To stretch across or cover an area.
Which is more common: Duration, Extent, Period, and Span?
Period is the most common in everyday English.
Which is more advanced: Duration, Extent, Period, and Span?
Span is the highest level, at C1, on the CEFR scale.
Are Duration, Extent, Period, and Span the same CEFR level?
Duration: B2, Extent: B2, Period: A1, Span: C1 on the CEFR scale.
What part of speech are Duration, Extent, Period, and Span?
Duration: noun, Extent: noun, Period: noun, Span: verb.
Can you show an example of each?
Duration: The school was used as a hospital for the duration of the war. Extent: The extent of the damage was greater than we initially thought. Period: We have a period for math today. Span: His acting career spanned 55 years.
Can I use Duration, Extent, Period, and Span interchangeably?
Not always. Duration, Extent, Period, and Span are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.