on occasion Synonyms

at times from time to time now and again now and then once in a while occasionally every now and then time to time spasmodically once or twice once in a blue moon on and off off and on some times hardly ever from case to case not regularly not always every now and again on occasions at one time or another in a few cases only now and then not often on the odd occasion in some cases every so often every once in a while ever and anon scarcely rarely periodically once irregularly interruptedly intermittently infrequently seldom sometimes sporadically ever and again discontinuously betweentimes between times at intervals uncommonly by fits and starts at random betimes