| occasionally(adverb, time, manner, interval, regularity) |
| off and on(expression, time, manner, interval, regularity) |
| oft(adverb, time, manner, interval, regularity) |
| often(adverb, time, manner, interval, regularity) |
| oftentimes(adverb, time, manner, interval, regularity) |
| ofttimes(adverb, time, manner, interval, regularity) |
| once in a while(expression, time, manner, interval, regularity) |
| once or twice(expression, time, manner, interval, regularity) |
| opportunely(adverb, time, course, period, continuance) |
| ordinarily(adverb, time, manner, interval, regularity) |
| out of sequence(expression, time, manner, interval, regularity) |
| over and over(expression, time, manner, interval, regularity) |
| pertinently(adverb, time, course, period, continuance) |
| presto(adverb, time, course, period, continuance) |
| primitively(adverb, time, course, period, continuance) |
| promptly(adverb, time, course, period, continuance) |
| rarely(adverb, time, manner, interval, regularity) |
| recently(adverb, time, course, period, continuance) |
| recurrently(adverb, time, manner, interval, regularity) |
| regularly(adverb, time, manner, interval, regularity) |