apparition vs daydream

apparition

noun
  • An unexpected, wonderful, or preternatural appearance; especially something such as a ghost or phantom. 

  • The first appearance of a star or other luminary after having been invisible or obscured; opposed to occultation. 

  • A period of consecutive days or nights when a particular celestial body may be observed, beginning with the heliacal rising of the body and ending with its heliacal setting. 

  • An act of becoming visible; appearance; visibility. 

  • The thing appearing; a visible object; a form. 

daydream

noun
  • A spontaneous series of thoughts while awake not connected to immediate reality. 

verb
  • To have such a series of thoughts; to woolgather. 

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