pornography vs propriety

pornography

noun
  • The depiction of (non-sexual) subject matter so that it elicits feelings analogous to erotic pleasure; any such depiction. 

  • The graphic, detailed, often gratuitous depiction of something. 

  • The explicit literary or visual depiction of sexual subject matter; any display of material of an erotic nature. 

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 pornography and propriety occurred in a corpus of books? (source: Google Ngram Viewer )