rùn​nián

leap year

闰年 閏年 rùn​nián
leap year noun
leap year; a year that contains an extra day in the solar calendar or an extra month in the lunar calendar

Even during leap years, February is the shortest month in the year.

Frequency

Movie subtitles
0.120 per million appears in 0% of films
Written text
0.475 per million

Sources