/ ɪnˈfriːkwənt; NAmE / adjective
not happening often
SYN rare :
her infrequent visits home
Muggings are relatively infrequent in this area.
OPP frequent
► in·fre·quent·ly adverb :
This happens not infrequently (= often) .
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WORD ORIGIN
mid 16th cent. (in the sense little used, seldom done, uncommon ): from Latin infrequent- from in- not + frequent- frequent.