家常便饭 - Chinese Idiom

家常便饭

Literally means:

ordinary daily meal

Actually means:

common occurrence of something or usual practice

It literally refers to meals taken by common people in their daily life. This phrase figuratively means common occurrences of something. It connotes that something is a common sight, and there is nothing unusual about it.

老百姓日常吃的普通饭食。比喻很平常的事情。有经常可以听到、见到，不值得奇怪的意味。