affront vs poisoned compliment

affront

noun
  • An open or intentional offense, slight, or insult. 

verb
  • To meet defiantly; to confront. 

  • To insult intentionally, especially openly. 

poisoned compliment

noun
  • Synonym of backhanded compliment 

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