criticism vs flattery

criticism

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

  • A critical observation or detailed examination and review. 

flattery

noun
  • An instance of excessive praise. 

  • Excessive praise or approval, which is often insincere and sometimes contrived to win favour. 

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