qīng​chá

to investigate thoroughly

清查 qīng​chá
to investigate thoroughly
to check thoroughly, conduct a comprehensive survey, or perform an audit; a thorough investigation or inspection (of accounts, assets, etc.)
to screen out
to ferret out or screen out undesirable elements; to identify and remove problematic individuals or items during an investigation

Frequency

Movie subtitles
1.70 per million appears in 1% of films
Written text
5.38 per million

Sources