obscenity vs vulgarism

obscenity

noun
  • Specifically, an offensive word; a profanity; a dirty word. 

  • An act of obscene behaviour. 

  • The qualities that make something obscene; lewdness, indecency, or offensive behaviour. 

  • Something that is obscene. 

vulgarism

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

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

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

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