anger vs foam at the mouth

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. 

foam at the mouth

verb
  • To rage, vent one's anger. 

  • To spew saliva as foam. 

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