| from time to time(expression, adverb, time, moment, rare) |
| every once in a while(expression, adverb, time, moment, rare) |
| sometimes(expression, adverb, time, moment, rare) |
| every so often(expression, adverb, time, moment, rare) |
| once in a while(expression, adverb, time, moment, rare) |
| now and again(expression, adverb, time, moment, rare) |
| now and then(expression, idiom, adverb, time, moment) |
| occasionally(expression, adverb, time, moment, rare) |
| once again |
| once and again(expression, adverb, time, moment, rare) |
| on and off(expression, adverb, time, moment, rare) |
| irregularly(adverb, rarely, infrequently, intermittently, occasionally) |
| hardly(adverb, rarely, infrequently, intermittently, occasionally) |
| not often(adverb, rarely, infrequently, intermittently, occasionally) |
| once in a blue moon(adverb, rarely, infrequently, intermittently, occasionally) |
| ever so often(adverb, occasionally) |
| fancifully |
| once in awhile(adjective, adverb) |
| quirkily |
| seldom(adverb, infrequently) |