| rarely(adverb, usual, barely, infrequency) |
| seldom(adverb, usual, barely, infrequency) |
| occasionally(expression, adverb, time, moment, usual) |
| hardly(adverb, barely, scarcely, seldom, intermittently) |
| sporadically(adverb, usual, simply, somewhat, barely) |
| little(adverb, usual, barely) |
| now and then(expression, idiom, adverb, time, moment) |
| scarcely(adverb, infrequency) |
| sometimes(expression, adverb, time, moment, period) |
| uncommonly |
| not often(expression, idiom, adverb, simply, somewhat) |
| on occasion(expression, idiom, adverb, time, moment) |
| sparsely |
| intermittently(adverb, variable, intermittent, occasionally, sporadically) |
| irregularly(adverb, variable, vacillating, intermittent, intermittently) |
| unusually(adverb, hardly, especially, seldom, rarely) |
| exceptionally(adverb, especially, unusually, rarely) |
| from time to time(expression, adverb, time, moment, rare) |
| hardly ever(expression, idiom, adverb, hardly, unusually) |
| in some cases |