shellac vs slash fiction

shellac

noun
  • A beating; a thrashing. 

  • A processed secretion of the lac insect, Coccus lacca; used in polishes, varnishes etc. 

verb
  • To coat with shellac. 

  • To inflict a heavy defeat upon. 

  • To beat; to thrash. 

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 shellac and slash fiction occurred in a corpus of books? (source: Google Ngram Viewer )