niú​jiǎo​guà​shū

to be diligent in one's studies

牛角挂书 牛角掛書 niú​jiǎo​guà​shū
to be diligent in one's studies
literally to hang one's books on cow horns; refers to the story of Li Mi from the Tang Dynasty who was so diligent he hung books on his ox's horns to read while traveling

Frequency

Written text
0.002 per million

Sources

Frequency data
BCC Corpus (BLCU)