ersatz vs genuine

ersatz

adj
  • Made in imitation; artificial, especially of a poor quality. 

noun
  • Something made in imitation; an effigy or substitute. 

genuine

adj
  • Not counterfeit, spurious, false, or adulterated 

  • Belonging to, or proceeding from the original stock; native 

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