annoy vs harass

annoy

verb
  • To disturb or irritate, especially by continued or repeated acts; to bother with unpleasant deeds. 

  • To do something to upset or anger someone; to be troublesome. 

  • To molest; to harm; to injure. 

harass

verb
  • To annoy (someone) frequently or systematically; to pester. 

  • To persistently bother (someone, or a group of people) physically or psychologically when such behaviour is illegal and/or unwanted, especially over an extended period. 

  • To trouble (someone, or a group of people) through repeated military-style attacks. 

  • To put excessive burdens upon (someone); to subject (someone) to anxieties. 

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