anger vs let fly

anger

verb
  • To become angry. 

  • To cause such a feeling of antagonism in. 

noun
  • A strong feeling of displeasure, hostility or antagonism towards someone or something, usually combined with an urge to harm, often stemming from perceived provocation, hurt, or threat. 

let fly

verb
  • To unleash an angry outburst. 

  • To strike or release a projectile with great force. 

  • She was furious and let fly at him with a string of obscenities. 

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