expiate vs forgive

expiate

verb
  • To make amends or pay the penalty for. 

  • To wind up, bring to an end. 

  • To purify with sacred rites. 

  • To atone or make reparation for. 

forgive

verb
  • To pardon; to waive any negative feeling or desire for punishment, retribution, or compensation. 

  • To accord forgiveness. 

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