beleaguer vs irritate

beleaguer

verb
  • To vex, harass, or beset. 

  • To besiege; to surround with troops. 

  • To exhaust. 

irritate

verb
  • To provoke impatience, anger, or displeasure in. 

  • To cause or induce displeasure or irritation. 

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

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