cohort vs true believer

cohort

noun
  • A colleague. 

  • A demographic grouping of people, especially those in a defined age group, or having a common characteristic. 

  • Any division of a Roman legion, normally of about 500 or 600 men (equalling about six centuries). 

  • Any band or body of warriors. 

  • A group of people supporting the same thing or person. 

  • A set of individuals in a program, especially when compared to previous sets of individuals within the same program. 

  • A natural group of orders of organisms, less comprehensive than a class. 

  • An accomplice; abettor; associate. 

verb
  • To associate with such a group 

true believer

noun
  • A strict follower of a doctrine. 

  • One who believes dogmatically in something regardless of evidence or even conclusive proof that the thing is false or was staged; one who has true-believer syndrome. 

  • Used other than figuratively or idiomatically: see true, believer. 

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