Commonly vs Often

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

Commonly

Top 2,000 (common) B2 adverb

Often

Top 1,000 (very common) A1 adverb

Most common: Often

	Commonly	Often
Pronunciation	🇬🇧 /["/ˈkɒmənli/"]/ 🇺🇸 /["/ˈkɑːmənli/"]/	🇬🇧 /["/ˈɒfn//ˈɒftən/"]/ 🇺🇸 /["/ˈɔːfn//ˈɔːftən/"]/
Meaning	happening often; usual	Many times; frequently.
Example	Commonly, people mistake these two similar terms for one another.	I often go to the park on weekends.
Register	Neutral	Neutral
How common	Top 2,000 (common)	Top 1,000 (very common)
CEFR level	B2	A1
Part of speech	adverb	adverb
Collocations	commonly used, commonly accepted, commonly known	often seen, often heard, often used, often considered, often overlooked
Antonyms	rarely, seldom	seldom, rarely, infrequently
Common mistakes	Using 'common' instead of 'commonly', Confusing 'commonly' with 'common', forgetting it's an adverb, Incorrectly placing 'commonly' in sentences	Using 'often' in place of 'seldom' (confusing frequency), Misplacing 'often' in a sentence (e.g., 'I often go' vs 'I go often'), Confusing 'often' with 'always' or 'never'
Usage notes	Use 'commonly' in everyday situations to describe things that are frequent or typical. It's more formal than using 'often', so avoid it in very casual conversations.	Use 'often' to describe actions that happen regularly. It's neutral and appropriate in most contexts, but avoid using it in very formal writing where terms like 'frequently' might be better.

See it in real clips

The Lord Of The Rings › The Fellowship Of The Ring

As often as I can spare them.

The Sopranos › S1 E1

Life is often good.

He hasn't shown up? He often doesn't.

The Lord Of The Rings › The Fellowship Of The Ring

As often as I can spare them.

The Sopranos › S1 E1

Life is often good.

Often

Frequently asked questions: Commonly vs Often

What's the difference between Commonly and Often?

Commonly: happening often; usual Often: Many times; frequently.

Which is more common: Commonly and Often?

Often is the most common in everyday English.

Which is more advanced: Commonly and Often?

Commonly is the highest level, at B2, on the CEFR scale.

Are Commonly and Often the same CEFR level?

Commonly: B2, Often: A1 on the CEFR scale.

What part of speech are Commonly and Often?

Commonly: adverb, Often: adverb.

Can you show an example of each?

Commonly: Commonly, people mistake these two similar terms for one another. Often: I often go to the park on weekends.

Can I use Commonly and Often interchangeably?

Not always. Commonly and Often 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.