faction vs slash fiction

faction

noun
  • The facts found in fiction. 

  • Strife; discord. 

  • A group of people, especially within a political organization, which expresses a shared belief or opinion different from people who are not part of the group. 

  • A form of literature, film etc., that treats real people or events as if they were fiction; a mix of fact and fiction. 

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