jì​yuán

epoch

纪元 (紀元) jì​yuán
epoch noun
The beginning of a new and significant period in history or a field of knowledge.
era noun
A system of chronological notation or the starting point used to number years in a calendar.

Frequency

Movie subtitles
0.180 per million appears in 0% of films
Written text
0.534 per million

Sources

Definitions
CC-CEDICT