flattery vs grievance

flattery

noun
  • An instance of excessive praise. 

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

grievance

noun
  • A formal complaint, especially in the context of a unionized workplace. 

  • Feelings of being wronged; outrage. 

  • A wrong or hardship suffered, which is the grounds of a complaint. 

  • Violation of regulations or objectionable behavior. 

  • A complaint or annoyance. 

  • Something which causes grief. 

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