cream off vs rip off

cream off

verb
  • To earn, or embezzle, a percentage of a profit. 

  • To separate (the best part of something from the regular part). 

  • To extract the cream or creamy part from something. 

  • To use a cream (cold cream) to remove something (usually makeup, from one's face). 

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 cream off and rip off occurred in a corpus of books? (source: Google Ngram Viewer )