chuī​máo​qiú​cī

nitpick

吹毛求疵 chuī​máo​qiú​cī
nitpick idiom
To find fault in an excessively detailed or trivial way; to be fastidious.

He is nitpicking over these trivial details, which is a real waste of time.

Frequency

Movie subtitles
1.19 per million appears in 1% of films
Written text
0.551 per million

Sources

Definitions
CC-CEDICT