exasperation vs heat of passion

exasperation

noun
  • The act of exasperating or the state of being exasperated; irritation; keen or bitter anger. 

  • Increase of violence or malignity; aggravation; exacerbation. 

heat of passion

noun
  • An outburst of anger that leads one to commit a criminal act, and is itself influenced by preceding events that might cause a reasonable person to lose self control. 

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