mō​dǐ

fact-finding

摸底 mō​dǐ
fact-finding verb
to investigate, probe, or scout to find out the real situation or background information

At the start of the semester, the teacher will give the students a diagnostic test.

Frequency

Movie subtitles
0.030 per million appears in 0% of films
Written text
3.19 per million

Sources

Definitions
CC-CEDICT