penance vs restitution

penance

noun
  • A voluntary self-imposed punishment for a sinful act or wrongdoing. It may be intended to serve as reparation for the act. 

  • Any instrument of self-punishment. 

  • A sacrament in some Christian churches. 

verb
  • To impose penance; to punish. 

restitution

noun
  • The act of making good or compensating for loss or injury. 

  • A process of compensation for losses. 

  • The movement of rotation which usually occurs in childbirth after the head has been delivered, and which causes the latter to point towards the side to which it was directed at the beginning of labour. 

  • That which is offered or given in return for what has been lost, injured, or destroyed; compensation. 

  • A return or restoration to a previous condition or position. 

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