rip-off vs scrounging

rip-off

noun
  • A theft or robbery. 

  • A copy, especially one that is illegal or inferior. 

  • A bad deal; an unfair or exorbitant price or rate. 

  • A scam. 

scrounging

noun
  • The act of one who scrounges. 

  • Material that has been scrounged. 

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