Custom - Indicates that the event has a recurring frequency that is unique.

自定义-表示该事件有一个反复出现的频率是独一无二的。

youdao

Patterns in the data: the frequency of recurring patterns in the data determines how effective compression will be for a particular table space or partition.

数据中的模式：对于特定的表空间或分区，数据中重复出现的模式的出现频率将决定压缩的效果。

youdao

My exception to the resolution of this case is that it seems to make far too light of a troubling event and of a situation that seems to be recurring with far too much frequency.

FORBES: Slap On Wrist For Causing JetBlue Emergency Landing