每年一度

once a year (every year)

each / every

every year / each year / yearly

surname Nian

year / CL:個|个[ge4]

grain / harvest (old) / variant of 年[nian2]

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

for a time / at one time / one time / once

to pass / to spend (time) / measure / limit / extent / degree of intensity / degree (angles, temperature etc) / kilowatt-hour / classifier for events and occurrences

to estimate / Taiwan pr. [duo4]