cabal vs fringe movement

cabal

verb
  • To engage in the activities of a cabal. 

noun
  • A putative, secret organization of individuals gathered for a political purpose. 

  • A secret plot. 

  • An identifiable group within the tradition of Discordianism. 

  • A secret political clique or faction. 

fringe movement

How often have the words cabal and fringe movement occurred in a corpus of books? (source: Google Ngram Viewer )