grift vs rort

grift

verb
  • To obtain money immorally or through deceitful means. 

  • To obtain illegally, as by con game. 

  • To obtain money illegally. 

noun
  • A confidence game or swindle. 

rort

verb
  • To cheat or defraud. 

noun
  • A scam or fraud, especially involving the misappropriation of public money or resources. 

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