Duration vs Hours

When to use each in English, with meaning, register, and examples.

Duration

Top 2,000 (common)B2noun

Hours

Top 1,000 (very common)
Most common: Hours
 DurationHours
Pronunciation🇬🇧 /["/djuˈreɪʃn/"]/🇺🇸 /["/duˈreɪʃn/"]/🇬🇧 //aʊəz//🇺🇸 //aʊərz//
MeaningThe length of time something lasts.A period of time equal to 60 minutes.
ExampleThe school was used as a hospital for the duration of the war.There are twenty-four hours in a day.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB2-
Part of speechnoun
Collocationsbrief, short, limited, decrease, reduce, shorten, for the duration (of), of… duration, throughout the duration ofwork hours, open hours, study hours, consulting hours, extra hours
Antonymsmoment, instantmoments, seconds, instants
Common mistakesConfused 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.Confused with 'hour' vs 'hours' (singular vs plural)., Using 'hours' incorrectly with uncountable nouns., Omitting the word 'hours' when discussing time durations.
Usage notesCommonly 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 'hours' to measure time in a general sense. Avoid using in very formal contexts; prefer 'hours' with numerical values for clarity.

Frequently asked questions: Duration vs Hours

What's the difference between Duration and Hours?

Duration: The length of time something lasts. Hours: A period of time equal to 60 minutes.

Which is more common: Duration and Hours?

Hours is the most common in everyday English.

Can you show an example of each?

Duration: The school was used as a hospital for the duration of the war. Hours: There are twenty-four hours in a day.

Can I use Duration and Hours interchangeably?

Not always. Duration and Hours 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.

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