ghostly vs nonhuman

ghostly

adj

  • Of or pertaining to ghosts or spirits. 

  • Spooky; frightening. 

nonhuman

adj

  • Not human; not of the human race. 

noun

  • A creature or thing that is not human. 

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