key fob vs phylactery

key fob

noun
  • An item carried on a key ring either as decoration or security. 

  • A passive wireless electronic device that usually uses RFID technology to control access to buildings, containers, computers, etc. by being placed near a detector. 

  • An active wireless electronic device that controls access to buildings or vehicles, such as a remote control for a car door lock. 

phylactery

noun
  • Any small object worn for its magical or supernatural power; an amulet or charm. 

  • Either of the two small leather cases, containing biblical scrolls, worn by Jewish men at morning prayer; the tefilla. 

  • A case in which (Christian) relics were preserved. 

  • An enspelled object used (by such as a lich) to contain and protect the owner's soul. 

  • A speech scroll, an illustrative device depicting speech, song or other sound as if written on a scroll. 

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