earful vs slap on the wrist

earful

noun

  • an angry reprimand, castigation or telling off 

  • intimate gossip 

slap on the wrist

noun

  • An overly mild punishment; a reprimand. 

  • Used other than figuratively or idiomatically: see slap, wrist. 

verb

  • To punish in an overly mild and largely symbolic manner. 

  • Used other than figuratively or idiomatically: see slap, wrist. 

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