HSK C7-9
Correct
顷
/ qīng /
Strokes
Definition
unit of area equal to 100 亩[mǔ] or 6.67 hectares/a short while/a little while ago/circa. (for approximate dates)
Example
As a Measure word
qing ［a unit of area equal to 100 mu or 6.6667 hectares, or 16.47 acres, currently called市顷］