apparitional vs phantasmal

apparitional

adj
  • Of or pertaining to an apparition or apparitions 

phantasmal

adj
  • Of or pertaining to ghosts or phantoms. 

  • Expresses qualities of or produced from fantasy. 

  • Eerie or frightening. 

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