rebuke vs slash fiction

rebuke

noun
  • A harsh criticism. 

verb
  • To criticise harshly; to reprove. 

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