Correct

替工

/ tìgōng / 
Strokes

Definition

replacement worker/substitute worker

Example

As a Verb

work as a temporary substitute; fill in for

1
Wǒ
我
míngtiān
明天
yǒushì
有事
  
,
qǐng
请
nǐ
你
gěi
给
wǒ
我
tì
替
yī
一
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
找
gè
个
tìgōng
替工

get a substitute/replacement; find a fill-in