| sometimes(expression, adjective, adverb, time, moment) |
| infrequently(expression, adjective, adverb, time, moment) |
| off and on(verb, expression, adjective, idiom, adverb) |
| occasionally(expression, adverb, time, moment, rare) |
| every once in a while(expression, adverb, time, moment, rare) |
| in some cases |
| now and then(expression, adjective, adverb, time, moment) |
| every now and then(expression, adverb, time, moment, rare) |
| every so often(expression, adverb, time, moment, rare) |
| from time to time(expression, adverb, time, moment, rare) |
| now and again(expression, adverb, time, moment, rare) |
| on occasion(expression, adverb, time, moment, rare) |
| once in a while(expression, adverb, time, moment, rare) |
| intermittently(expression, adjective, adverb, time, rare) |
| sporadically(expression, adjective, adverb, time, rare) |
| at intervals(expression, adverb, time, rare, frequency) |
| at times(expression, adverb, time, moment, rare) |
| periodically(expression, adverb, time, rare, frequency) |
| seldom(adverb, infrequently, now and then) |
| variable(adjective, adverb, vacillating, intermittent, on-and-off) |