contrivance vs rort

contrivance

noun
  • Something overly artful or artificial. 

  • A means, such as an elaborate plan or strategy, to accomplish a certain objective. 

  • A (mechanical) device to perform a certain task. 

rort

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

verb
  • To cheat or defraud. 

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