ersatz vs fictive

ersatz

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

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

fictive

adj
  • Resulting from imaginative creation: fanciful or invented. 

  • Being feigned, ingenuine or unreal. 

  • Having the characteristics of fiction: fictional. 

noun
  • In claimed cases of dissociative identity disorder: an introject based on a character from a fictional work. 

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