dī​kuì​yǐ​xué

a small oversight can cause a great disaster

堤溃蚁穴 堤潰蟻穴 dī​kuì​yǐ​xué
a small oversight can cause a great disaster
Literally meaning that an ant nest can cause a dam to collapse, used to warn that slight negligence or small mistakes can lead to major catastrophe.

Frequency

Written text
0.001 per million

Sources

Frequency data
BCC Corpus (BLCU)