flattery vs impertinence

flattery

noun
  • An instance of excessive praise. 

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

impertinence

noun
  • Insolence; impudence. 

  • Lack of pertinence; irrelevance. 

  • An instance of this; a moment of being impertinent. 

  • The fact or character of being out of place; inappropriateness. 

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