| almost never(expression, adverb, barely, terrifically, seldom) |
| alternately(adverb, vacillating, uncertainly, variably, on-and-off) |
| anyhow |
| anyway |
| at intervals(expression, adverb, uncertainly, intermittently, occasionally) |
| at irregular intervals(expression, idiom, adverb, intermittent, uncertainly) |
| at various times(expression, adjective, idiom, intermittent, isochronal) |
| back and forth(expression, idiom, variably, alternately) |
| by bits and pieces(expression, adjective, idiom, irregular, infrequent) |
| centennial(adjective, intermittent, isochronal, seasonal) |
| curiously(terrifically, unfrequently) |
| cyclic(adjective, irregular, infrequent, sporadic, intermittent) |
| epochal(adjective, irregular, infrequent, sporadic, intermittent) |
| every once in a while(expression, adjective, idiom, adverb, intermittent) |
| every other(expression, adjective, irregular, infrequent, intermittent) |
| every so often(expression, adjective, idiom, adverb, intermittent) |
| extra(adverb, barely, terrifically, seldom, unfrequently) |
| finely(adverb, barely, terrifically, seldom, unfrequently) |
| from pillar to post(expression, idiom, variably, alternately) |
| from side to side(expression, idiom, variably, alternately) |