sect vs skepticism

sect

noun
  • An offshoot of a larger religion or denomination, usually and especially one with unorthodox or extreme political and/or religious beliefs. 

  • A group following a specific ideal or a leader. 

skepticism

noun
  • Doubt or disbelief of religious doctrines 

  • The practice or philosophy of being a skeptic. 

  • The doctrine that absolute knowledge is not possible 

  • A studied attitude of questioning and doubt 

  • A methodology that starts from a neutral standpoint and aims to acquire certainty though scientific or logical observation. 

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