cheating vs purgatory

cheating

adj
  • Unsporting or underhand. 

  • Unfaithful or adulterous. 

noun
  • The arrangement of people or items in a film so as to give the (false) impression that shots are taken from different angles in the same location. 

  • An act of deception, fraud, trickery, imposture, imposition or infidelity. 

purgatory

adj
  • Tending to cleanse; expiatory. 

noun
  • Any situation where suffering is endured, particularly as part of a process of redemption. 

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