yī​dù HSK7

at one time

一度 yī​dù
at one time adverb
for a period of time in the past; formerly

This snack was once very popular, but now no one eats it.

once numeral
a single time; on one occasion

This shop's business was very good at one point.

Frequency

Movie subtitles
2.38 per million appears in 1% of films
Written text
60.6 per million

Details

HSK 2.0
Level 6
HSK 3.0
Level 7

Sources

Definitions
CC-CEDICT