illusory vs phantasmagoric

illusory

adj
  • Resulting from an illusion; deceptive, imaginary, unreal. 

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 illusory and phantasmagoric occurred in a corpus of books? (source: Google Ngram Viewer )