misnomer vs vernacularism

misnomer

noun
  • A term whose sense in common usage conflicts with a technical sense. 

  • something asserted not to be true; a myth or mistaken belief 

  • A term that is misleading, even if it may not be incorrect. 

  • A use of a term that is misleading; a misname. 

verb
  • To use a misleading term; to misname. 

vernacularism

noun
  • A vernacular idiom. 

  • The belief that texts should be published in the vernacular. 

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