compliment vs regret

compliment

noun
  • An expression of praise, congratulation, or respect. 

  • Complimentary language; courtesy, flattery. 

verb
  • To pay a compliment (to someone); to express a favourable opinion (of someone). 

regret

verb
  • 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. 

  • To feel sorry about (any thing). 

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. 

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