补差
bǔ​chā

to make up a deficiency

补差 補差 bǔ//chā
to make up a deficiency
to make up a difference between two amounts; specifically, to pay the difference between a person's retirement pension and their former full salary when they are rehired
price difference payment
the money paid to cover a difference in price or amount; a top-up payment

Frequency
Written text
0.579 per million

Sources
Frequency data
BCC Corpus (BLCU)