Daily Chinese Idiom Wordle Game
屡见不鲜 (lǚ jiàn bù xiān)
It is not surprising because it has been seen many times; common occurrence.
Literal: repeatedly see not fresh
Such complaints are lǚ jiàn bù xiān in customer service.
This idiom describes something that happens so often it loses its novelty.
The third character means 'not' and the fourth means 'fresh' or 'rare'.