onetime

one-off, one-shot

nonce; inconstant, infrequent, intermittent, irregular, occasional

common, commonplace, everyday, familiar, ordinary, routine, ubiquitous, usual; cyclic ( cyclical); around-the-clock, constant, continual, hourly, round-the-clock; accustomed, chronic, confirmed, customary, habitual, inveterate; expected; annual, yearly

erstwhile, late, old, once, onetime, other, past, quondam, sometime, whilom

bygone, dead, defunct, departed, expired, extinct, gone, long-ago, vanished

contemporary, current, extant, ongoing, present, present-day; coming, future, prospective, unborn