yuán​diǎn

starting point

原点 (原點) yuán​diǎn
starting point noun
the point at which something begins; square one

If this plan fails, we must go back to square one and start over.

origin noun
the intersection of the axes in a coordinate system, where all coordinates are zero

In a Cartesian coordinate system, the coordinates of the origin are usually represented as (0,0).

Frequency

Movie subtitles
1.31 per million appears in 1% of films
Written text
2.23 per million

Sources

Definitions
CC-CEDICT