probity vs worthiness

probity

noun
  • Integrity, especially of the quality of having strong moral principles; decency and honesty. 

worthiness

noun
  • The state or quality of having value or merit. 

  • The state or quality of being qualified or eligible. 

  • The result or product of having value or merit. 

  • The result or product of being qualified or eligible. 

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