| intermittent(adjective, irregular, erratic, recurrent, sporadic) |
| repeating |
| by bits and pieces(expression, adjective, idiom, irregular, erratic) |
| cyclic(adjective, irregular, erratic, infrequent, recurrent) |
| epochal(adjective, irregular, erratic, infrequent, recurrent) |
| every other(expression, adjective, irregular, erratic, infrequent) |
| here and there(expression, adjective, idiom, irregular, erratic) |
| isochronal(adjective, irregular, erratic, infrequent, recurrent) |
| isochronous(adjective, irregular, erratic, infrequent, recurrent) |
| iterating |
| iterative |
| periodic(adjective, irregular, erratic, infrequent, recurrent) |
| periodical(adjective, irregular, erratic, infrequent, recurrent) |
| recurrent(adjective, irregular, erratic, infrequent, sporadic) |
| repetitious(adjective, tedious, wordy) |
| seasonal(adjective, irregular, erratic, infrequent, recurrent) |
| stop-and-go(adjective, irregular, erratic, infrequent, recurrent) |
| at various times(expression, adjective, idiom, intermittent, isochronal) |
| centennial(adjective, intermittent, isochronal, seasonal) |
| discontinuous |