annoyance vs reassurance

annoyance

noun
  • The psychological state of being annoyed or irritated. 

  • That which annoys. 

  • An act or instance of annoying. 

reassurance

noun
  • The act of confirming someone's opinion or impression. 

  • Reinsurance. 

  • The feeling of being reassured, of having confidence restored, of having apprehensions dispelled. 

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