I. WORDS EXPRESSING ABSTRACT RELATIONS
VI. TIME
3. RECURRENT TIME
Infrequency.
[Antonyms: frequency.]
[Nouns] infrequency, rareness, rarity; fewness [more]; seldomness; uncommonness.
[Adjectives] unfrequent, infrequent; rare, rare as a blue diamond; few [more]; scarce; almost unheard of, unprecedented, which has not occurred within the memory of the oldest inhabitant, not within one's previous experience.
[Adverbs] seldom, rarely, scarcely, hardly; not often, not much, infrequently, unfrequently, unoften; scarcely, scarcely ever, hardly ever; once in a blue moon.
once; once for all, in a way; pro hac vice.