Chinese mile vs li

Chinese mile

noun
  • A li, a traditional Chinese unit of distance equal to 1500 Chinese feet or 150 zhangs, now standardized as a half-kilometer (500 meters). 

li

noun
  • The Chinese mile, a traditional unit of distance equal to 1500 chis or 150 zhangs, now standardized as a half-kilometer (500 meters). 

  • The Korean mile, a traditional unit of distance equivalent to about 393 m. 

  • In solfège, the raised sixth note of a major scale (the note A-sharp in the fixed-do system). 

  • A meaningful ceremony or ritual; etiquette, behaviour. 

  • A traditional Chinese unit of weight, equal to one-thousandth of a liang, or fifty milligrams. 

  • An ancient Chinese cauldron having three hollow legs. 

How often have the words Chinese mile and li occurred in a corpus of books? (source: Google Ngram Viewer )