contrivance vs sincerity

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. 

sincerity

noun
  • The quality or state of being sincere 

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