Ache vs Laze

Ache

name
  • A language spoken by the Yi people of South-Western China. 

Laze

name
  • A language of the Naish subbranch of the Naic group of languages, spoken in Muli Tibetan Autonomous County western Sichuan, China. 

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