xià​bù​wéi​lì

just once

下不为例 (下不為例) xià​bù​wéi​lì
just once verb
not to be repeated or taken as a precedent; allowed only this one time

原谅下不为例

zhè yuán​liàng , dàn xià​bù​wéi​lì.

I'll forgive you this time, but don't let it happen again.

Frequency

Movie subtitles
1.79 per million appears in 1% of films
Written text
0.374 per million

Sources

Definitions
CC-CEDICT