assist vs harass

assist

verb
  • To help compensate for what is missing with the help of a medical technique or therapy. 

  • To help. 

  • To make a pass that leads directly towards scoring. 

noun
  • A decisive pass made to the goal scorer 

  • A helpful action or an act of giving. 

  • A defensive play, allowing a teammate to record a putout. 

harass

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

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

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

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