fanaticism vs sectarianism

fanaticism

noun
  • The characteristic or practice of being a fanatic. 

sectarianism

noun
  • Rigid adherence to a particular sect, denomination, ideology, or party. 

  • A political system in which power is shared among religious sects based on a constitutional formula distributing public offices among these sects 

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