praise vs slap in the face

praise

verb
  • To give praise to; to commend, glorify, or worship. 

noun
  • Commendation; favourable representation in words. 

  • Worship. 

slap in the face

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

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

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