autoeroticism vs decadence

autoeroticism

noun
  • The practise of stimulating oneself sexually, masturbation 

decadence

noun
  • The quality of being luxuriously self-indulgent. 

  • A state of moral or artistic decline or deterioration; decay 

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