biān​xiàn

sideline

边线 邊線 biān​xiàn
sideline
the lines along the sides of a playing field in sports like tennis, soccer, or basketball, or a foul line in baseball
margin
the edge of text on a page or a border line marking the boundary of a layout

Frequency

Movie subtitles
0.830 per million appears in 0% of films
Written text
1.90 per million

Sources