garble vs mistranslate

garble

verb
  • To make false by mutilation or addition 

  • To pick out such parts (of a text) as may serve a purpose; to mutilate; to pervert 

noun
  • Confused or unintelligible speech. 

mistranslate

verb
  • To translate incorrectly. 

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