congratulatory vs flattering

congratulatory

adj
  • Serving to congratulate. 

flattering

adj
  • Gratifying to one's self-esteem; complimentary. 

  • Attractive or good-looking; that makes one look good. 

  • That which represents too favorably. 

noun
  • The action of the verb to flatter. 

  • Instances of flattery. 

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