once in a blue moon
not very often:
My sister lives in Alaska, so I only see her once in a blue moon.
Thesaurus: synonyms and related words
Rarely & infrequently
- (every) now and then/again idiom
- blue
- ever and anon
- every
- few
- fit
- in/by fits and starts idiom
- infrequent
- occasion
- occasional
- occasionally
- odd
- odd jobs
- once
- one-shot
- rarely
- seldom
- ship
- sometimes
- stop-and-go
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