zhēn​chá

investigate

侦查 (偵查) zhēn​chá
investigate verb
to conduct a formal criminal investigation or inquiry to gather evidence and facts

The police are conducting an in-depth investigation into this case.

detect verb
to scout or perform surveillance to uncover hidden information or enemy activity

During the investigation, the police discovered several important clues at the scene.

Frequency

Movie subtitles
5.28 per million appears in 2% of films
Written text
13.6 per million

Sources

Definitions
CC-CEDICT