backstab vs rob

backstab

verb
  • to attack someone (especially verbally) unfairly in a deceitful, underhand, or treacherous manner, especially when they're not present in the place or situation that it happens. (as if stabbing them in the back). See backbite. 

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 backstab and rob occurred in a corpus of books? (source: Google Ngram Viewer )