flak vs flout

flak

noun
  • Adverse criticism. 

  • A public-relations spokesperson. 

  • Anti-aircraft shell fire. 

  • Ground-based anti-aircraft guns firing explosive shells. 

flout

noun
  • A mockery or insult. 

  • The act by which something is flouted; violation of a law. 

verb
  • To express contempt for (laws, rules, etc.) by word or action. 

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