criterion vs ethic

criterion

noun
  • A standard or test by which individual things or people may be compared and judged. 

ethic

noun
  • A set of principles of right and wrong behaviour guiding, or representative of, a specific culture, society, group, or individual. 

  • The morality of an action. 

adj
  • Moral, relating to morals. 

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