infrequency 指“不频繁、罕见;发生次数少的状态”。(也可用来表示某事“不常见”的特点。)
/ɪnˈfriːkwənsi/
The infrequency of buses makes commuting difficult.
公交车班次不频繁让通勤变得困难。
Due to the infrequency of his visits, the neighbors barely recognized him when he returned.
由于他来访得很少,邻居们在他回来时几乎认不出他。
由 in-(否定前缀,表示“不”)+ frequency(频率、频繁)构成,字面意思就是“不频繁”。frequency 源自拉丁语 frequentia,表示“频繁、常见”。