misname vs vulgarism

misname

noun
  • A wrong, unsuitable, misleading, or injurious name or designation; misnomer. 

verb
  • To give an unsuitable or injurious name to; name incorrectly. 

  • To call by a wrong name. 

vulgarism

noun
  • A spelling, word, or phrase used in common speech that is considered improper or incorrect for formal communication. 

  • Editors of newspapers allow more vulgarisms to go to print today than they used to. 

  • A word or term that is considered offensive or vulgar. 

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