exasperation vs tormenting

exasperation

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

  • Increase of violence or malignity; aggravation; exacerbation. 

tormenting

noun
  • The act by which somebody is tormented. 

adj
  • Involving or causing torment. 

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