compliment vs criticism

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). 

criticism

noun
  • The act of criticising; a critical judgment passed or expressed 

  • A critical observation or detailed examination and review. 

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