找茬 zhǎo​chá
nitpick verb
to pick fault with, find complaint with, or intentionally pick a quarrel

He is always picking a fight, which makes everyone unhappy.

spot differences verb
to spot the differences (often in a game or picture puzzle)

This 'spot the difference' game is a real test of observation.

Frequency

Movie subtitles
0.690 per million appears in 0% of films

Sources

Frequency data
SUBTLEX-CH