follow in someone's footsteps vs rip off

follow in someone's footsteps

verb
  • To follow the same path as someone; to take actions similar to another's. 

rip off

verb
  • To steal, cheat or swindle. Especially to charge an exorbitant or unfair rate. 

  • To pull off by ripping 

  • To copy, especially illegally. 

How often have the words follow in someone's footsteps and rip off occurred in a corpus of books? (source: Google Ngram Viewer )