expiate vs redeem oneself

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. 

redeem oneself

verb
  • To resolve, or make up for, one's previous folly. 

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