brush-off vs slap in the face

brush-off

noun
  • An abrupt rebuff, a snub or curt rejection, a disdainful dismissal. 

slap in the face

noun
  • Something unexpectedly said or done which causes shock or offense; an insult, rebuke, or rebuff. 

  • Used other than figuratively or idiomatically: see slap, in, the, face. 

How often have the words brush-off and slap in the face occurred in a corpus of books? (source: Google Ngram Viewer )