gash vs slash fiction

gash

noun
  • A deep cut. 

  • A vulva. 

  • Rubbish on board an aircraft. 

  • Unused film or sound during film editing. 

  • Rubbish, spare kit. 

  • A woman. 

  • Poor quality beer, usually watered down. 

adj
  • ghastly; hideous 

  • Of poor quality; makeshift; improvised; temporary; substituted. 

verb
  • To make a deep, long cut; to slash. 

slash fiction

noun
  • A work in the genre of slash fiction 

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

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