勘察 kān​chá
reconnoiter verb
to explore or scout an area to gather strategic or military information

Scouts reconnoitered the enemy positions before the battle.

survey verb
to conduct an onsite investigation or field survey, particularly for engineering, construction, or scientific data collection

The engineer conducted a detailed survey of the building site before construction began.

Frequency

Movie subtitles
0.780 per million appears in 0% of films
Written text
4.57 per million

Sources