Synonyms to infrequent

occasional, accessory, accidental, accompanying, additional, ado, adventitious, afloat, afoot, aleatory, auxiliary, behind the scenes, by-the-way, casual, causal, causative, ceremonial, circumstantial, conditional, constitutive, contingent, current, decisive, determinative, doing, effectual, etiological, eventuating, extra, few, formative, going on, happening, in hand, in the wind, incidental, inessential, institutive, intermittent, irregular, nonessential, occurring, odd, off, on, on foot, ongoing, originative, out-of-the-way, parenthetical, part-time, particular, passing, periodic, pivotal, prevailing, prevalent, provisional, random, rare, resultant, ritual, scarce, seldom, side, spare, special, sporadic, supplementary, taking place, uncommon, under way, unessential, unfrequent, cheeseparing, Scotch, canny, careful, chary, cheap, chinchy, chintzy, close, closefisted, conserving, cooling, cooling down, cooling off, curtailment, cutback, economic, economization, economizing, economy, economy of assumption, economy of means, elegance, exiguous, forehanded, frugal, frugal to excess, frugality, grudgi