tì​bǔ

replace

替补 (替補) tì​bǔ
replace verb
to replace or substitute a component, player, or worker with another

The coach decided to have him sub for the injured forward.

substitute verb
a person or thing that acts as a replacement or backup

He has always played a substitute role on the team.

Frequency

Movie subtitles
4.05 per million appears in 2% of films
Written text
15.0 per million

Sources

Definitions
CC-CEDICT