li as a Korean unit of distance vs ri

li as a Korean unit of distance

ri

noun
  • Synonym of li as a Korean unit of distance equivalent to about 393 m. 

  • The solfeggio syllable used to indicate the sharp of the second note of a major scale, enharmonic to me. 

How often have the words li as a Korean unit of distance and ri occurred in a corpus of books? (source: Google Ngram Viewer )