cool off vs harass

cool off

verb
  • To cause to decrease in temperature, activity or temper. 

  • To decrease in temperature, activity, or temper. 

harass

verb
  • 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. 

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

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