flak vs upbraiding

flak

noun
  • Adverse criticism. 

  • A public-relations spokesperson. 

  • Anti-aircraft shell fire. 

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

upbraiding

noun
  • An instance of severe criticism or rebuke. 

adj
  • Reproachful; chiding; censorious. 

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