regret vs repent

regret

verb
  • To feel sorry about (any thing). 

  • To feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead. 

noun
  • Emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing. 

  • The amount of avoidable loss that results from choosing the wrong action. 

repent

verb
  • To be sorry for, to regret. 

  • To feel pain, sorrow, or regret for what one has done or omitted to do; the cause for repenting may be indicated with "of". 

  • To feel pain on account of; to remember with sorrow. 

  • To be sorry for sin as morally evil, and to seek forgiveness; to cease to practice sin and to love. 

adj
  • Creeping along the ground. 

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