foulness vs pornography

foulness

noun
  • The state of being foul. 

pornography

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

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

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

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