deaden vs irritate

deaden

verb
  • To render less lively; to diminish; to muffle. 

  • To become less lively; to diminish (by itself). 

  • To make soundproof. 

irritate

verb
  • To cause or induce displeasure or irritation. 

  • To induce pain in (all or part of a body or organism). 

  • To provoke impatience, anger, or displeasure in. 

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