not happening often synonym rare opposite frequent不常发生的;罕见的 Extra ExamplesAmerican trains are infrequent and the network is patchy. 美国火车班次很少,而且覆盖网络不完整。 Calls for a return to traditional values are not infrequent. 要求回归传统价值观的呼声并不少见。 Disagreements are relatively infrequent. 分歧相对较少。 Examinations need to be carried out only at infrequent intervals. 偶尔才需要进行检查。 Victoria pined and cherished his infrequent postcards. 维多利亚渴望并珍惜他罕见的明信片。
Oxford Collocations Dictionaryverbs- be
- become
- extremely
- fairly
- very
- …
Word Originmid 16th cent. (in the sense ‘little used, seldom done, uncommon’): from Latin infrequent- from in- ‘not’ + frequent- ‘frequent’.