Not regularly vs Occasionally

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

Not regularly

Top 5,000 (fairly common)

Occasionally

Top 2,000 (common)B2adverb
Most common: Occasionally
 Not regularlyOccasionally
Pronunciation🇬🇧 //nɒt ˈrɛɡjʊləli//🇺🇸 //nɑt ˈrɛɡjʊlɛrli//🇬🇧 /["/əˈkeɪʒnəli/"]/🇺🇸 /["/əˈkeɪʒnəli/"]/
MeaningNot happening often or at regular times.Sometimes, but not often.
ExampleI exercise not regularly, but when I do, I give it my all.We occasionally meet for a drink after work.
RegisterNeutralNeutral
How commonTop 5,000 (fairly common)Top 2,000 (common)
CEFR level-B2
Part of speechadverb
Collocationsnot regularly scheduled, not regularly occurring, not regularly implementedoccurs occasionally, rarely used occasionally, happens occasionally
Antonyms-frequently, often, regularly
Common mistakesUsing 'not regular' instead of 'not regularly'., Confusing with 'irregularly', which implies different patterns of occurrence., Using with countable nouns incorrectly, e.g., 'not regularly meals.'Using 'occasionally' when 'often' is more appropriate., Confusing 'occasionally' with 'occasion' (which is a noun)., Adding unnecessary prepositions, e.g., 'occasionally at'.
Usage notesUsed in both spoken and written contexts to indicate infrequency; suitable for formal and informal situations.Used in both spoken and written English. It often implies that something happens at irregular intervals, which makes it less formal than some alternatives, but still appropriate for most contexts.

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Not regularly
Occasionally

Frequently asked questions: Not regularly vs Occasionally

What's the difference between Not regularly and Occasionally?

Not regularly: Not happening often or at regular times. Occasionally: Sometimes, but not often.

Which is more common: Not regularly and Occasionally?

Occasionally is the most common in everyday English.

Can you show an example of each?

Not regularly: I exercise not regularly, but when I do, I give it my all. Occasionally: We occasionally meet for a drink after work.

Can I use Not regularly and Occasionally interchangeably?

Not always. Not regularly and Occasionally 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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