ersatz vs mythical

ersatz

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

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

mythical

adj
  • Not real; false or fabricated. 

  • Existing in myth. 

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