| occasionally(expression, adverb, time, continue, usual) |
| intermittently(expression, adverb, time, continue, rare) |
| irregularly(adverb, variable, vacillating, rarely, infrequently) |
| seldom(adverb, usual, infrequently) |
| now and then(expression, idiom, adverb, time, rare) |
| periodically(expression, adverb, time, continue, rare) |
| infrequently(adverb, usual, simply, somewhat, barely) |
| sometimes(expression, adverb, time, continue, rare) |
| uncommonly(adverb, infrequently) |
| off and on(expression, idiom, adverb, time, rare) |
| fitfully(adverb, irregularly, capriciously) |
| hardly(adverb, infrequently) |
| randomly(adverb, capriciously, motivelessly) |
| rarely(adverb, usual, infrequently) |
| now and again(expression, idiom, adverb, time, continue) |
| sparsely(adverb, infrequently) |
| unsystematically(adverb, irregularly) |
| from time to time(expression, adverb, time, rare, now) |
| spasmodically(adverb, intermittently, haphazardly, erratically) |
| capriciously(adverb, irregularly, capriciously, motivelessly) |