misnomer vs misusage

misnomer

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

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

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

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

verb
  • To use a misleading term; to misname. 

misusage

noun
  • Improper usage (especially of words). 

  • Abuse; improper handling or treatment. 

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