| occasionally(expression, adverb, time, continue, rare) |
| sporadically(expression, adverb, time, continue, rare) |
| now and then(expression, idiom, adverb, time, rare) |
| regularly(adverb, regularly, intermittently, recurrently) |
| intermittently(expression, adverb, time, continue, late) |
| sometimes(expression, adverb, time, continue, rare) |
| now and again(expression, idiom, adverb, time, continue) |
| cyclically(adverb, exactly, regularly, daily, steadily) |
| from time to time(expression, adverb, time, rare, now) |
| recurrently(adverb, regularly, recurrently) |
| off and on(expression, adverb, time, rare, frequency) |
| once again |
| once in a while(expression, adverb, time, rare, frequency) |
| periodic(expression, adjective, time, rare, frequency) |
| frequently(adverb, regularly, recurrently) |
| infrequently(adverb, intermittently, occasionally, sporadically, haphazardly) |
| systematically(order, intermittently) |
| rhythmically(adverb, regularly, recurrently) |
| continually(adverb, regularly) |
| irregularly(adverb, infrequently, intermittently, occasionally, sporadically) |