mistreatment vs vernacularity

mistreatment

noun
  • Cruel, abusive , bad, unfair, or thoughtless treatment of a person or animal (only rarely of an object or a machine; usually: mishandle). 

vernacularity

noun
  • A vernacular utterance. 

  • The quality of being vernacular. 

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