authentic vs phantasmagoric

authentic

adj
  • Conforming to reality and therefore worthy of trust, reliance, or belief. 

  • Of the same origin as claimed; genuine. 

  • Having the final as the lowest note of the mode. 

phantasmagoric

adj
  • Characterized by or pertaining to a dreamlike blurring of real and imaginary elements. 

  • Characterized by or pertaining to rapid changes in light intensity and colour. 

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