gōng​chāgōng​chāi

common difference

公差 gōng​chā
common difference noun
the constant difference between any two consecutive terms in an arithmetic progression
tolerance noun
the amount of variation or error allowed in the dimensions or properties of a manufactured part
公差 gōng​chāi
bailiff noun
a low-ranking official or runner in a yamen in pre-modern China
official business
an official errand or business trip

Frequency

Movie subtitles
0.150 per million appears in 0% of films
Written text
0.867 per million

Sources

Definitions
CC-CEDICT