偶一为之

偶一為之
ǒuyīwéizhī
  1. to do sth once in a while (idiom)
  2. to do sth more as an exception than the rule

CEDICT

偶然做一次。

重編國語辭典

Entry Composition

1 偶一 ǒuyī
  1. accidentally
  2. once in a while
  3. very occasionally
=2 为 wéi
  1. as (in the capacity of)
  2. to take sth as
  3. to act as
  4. to serve as
  5. to behave as
  6. to become
  7. to be
  8. to do
  9. by (in the passive voice)
=2 为 wéi variant of 为 wéi
3 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it