Correct

替工

/ tìgōng /
Strokes

Definition

replacement worker/substitute worker

Example

As a Verb

work as a temporary substitute; fill in for

1
míngtiān
明天
yǒushì
有事
  
,
qǐng
gěi
xiàgōng
下工
  

I have an appointment tomorrow. Would you please replace me for the day?

As a Noun

temporary substitute (worker); fill-in

2
Zhǎo
gōng
替工

get a substitute/replacement; find a fill-in