prey vs rob

prey

verb
  • To act as a predator. 

noun
  • That which is or may be seized by animals or birds to be devoured 

  • A person or thing given up as a victim. 

  • A living thing that is eaten by another living thing. 

  • The victim of a disease. 

rob

verb
  • To steal from, especially using force or violence. 

  • To steal. 

  • To burgle. 

  • To deprive (of). 

  • To deprive of, or withhold from, unjustly or injuriously; to defraud. 

  • To commit robbery. 

  • To take possession of the ball, puck etc. from. 

noun
  • A syrup made of evaporating fruit juice over a fire, usually mixed with sugar or honey, and especially used for medicinal purposes. 

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