| periodically(adverb, time, manner, interval, regularity) |
| at times(expression, time, manner, interval, regularity) |
| infrequently(adverb, time, manner, interval, regularity) |
| now and again(expression, time, manner, interval, regularity) |
| at intervals(expression, time, manner, interval, regularity) |
| sporadically(adverb, time, manner, interval, regularity) |
| every now and then(expression, time, manner, interval, regularity) |
| every so often(expression, time, manner, interval, regularity) |
| from time to time(expression, time, manner, interval, regularity) |
| hardly(adverb, time, manner, interval, regularity) |
| irregularly(adverb, time, manner, interval, regularity) |
| on occasion(expression, time, manner, interval, regularity) |
| once in a blue moon(expression, time, manner, interval, regularity) |
| seldom(adverb, time, manner, interval, regularity) |
| sometimes(adverb, time, manner, interval, regularity) |
| spasmodically(adverb, time, manner, interval, regularity) |
| timely(adverb, time, course, period, continuance) |
| uncommonly(adverb, time, manner, interval, regularity) |
| again and again(expression, time, manner, interval, regularity) |
| any which way(expression, time, manner, interval, regularity) |