Synonyms:
- abnormally,
- at infrequent intervals,
- few,
- hardly,
- hardly ever,
- incredibly,
- infrequently,
- irregularly,
- little,
- not often,
- occasional,
- occasionally,
- rare,
- rarely,
- scarce,
- scarcely,
- scarcely ever,
- seldom if ever,
- sparsely,
- sporadic,
- sporadically,
- uncommon,
- uncommonly,
- uncustomarily,
- unexpectedly,
- unfrequent,
- unfrequently,
- unnaturally,
- unoften,
- unordinarily,
- unusually,
- very seldom