抽查 (chōu chá): random inspection; to do a spot check

The teacher decided to randomly check how ten students recited the text during morning reading.

The company will randomly inspect employees' computer usage records from time to time to ensure information security.

The food safety department conducted a random inspection of vegetables on the market and found that some pesticide residues exceeded the standard.

In order to prepare for this exam, I randomly check my vocabulary memorization every day.