cleanse vs expiate

cleanse

verb
  • To spiritually purify; to free from guilt or sin; to purge. 

  • To free from dirt; to clean, to purify. 

  • To remove (something seen as unpleasant) from a person, place, or thing. 

noun
  • An act of cleansing; a purification. 

expiate

verb
  • To purify with sacred rites. 

  • To wind up, bring to an end. 

  • To make amends or pay the penalty for. 

  • To atone or make reparation for. 

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