obscenity vs propriety

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. 

propriety

noun
  • The fact of possessing something; ownership. 

  • Suitability, fitness; the quality of being appropriate. 

  • Correctness in behaviour and morals; good manners, seemliness. 

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