Correct

尘垢

/ chén gòu /
Strokes

Example

As a Noun

dust and dirt; dirt and grime

1
Fáng
房屋
jīngcháng
经常
sǎo
打扫
  
,
chéngòu
尘垢
hěnkuài
很快
jiù
yuè
yuè
duō
  

Dust and dirt soon accumulate if a house is not cleaned regularly.

As a Noun

worldly cares/worries