fanny vs slash fiction

fanny

noun
  • Women viewed as sexual objects. 

  • The female genitalia. 

  • The buttocks; arguably the most nearly polite of several euphemisms. 

  • Mess kettle or cooking pot. 

  • Sexual intercourse with a woman. 

slash fiction

noun
  • A genre of fan fiction focusing on romantic and/or sexual relationships between characters of the same sex (typically men). 

  • A work in the genre of slash fiction 

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