máo​mao​yǔ

drizzle

毛毛雨 máo​mao​yǔ
drizzle
drizzle; very light rain where the drops are too small to form distinct streaks
mere trifle
something that is not very important or serious; a tiny amount of money or resources that has little effect
advance warning
(metaphorical) to give someone a heads-up or drop a hint before officially starting a task or project

Frequency

Movie subtitles
0.240 per million appears in 0% of films
Written text
0.557 per million

Sources