key fob vs pendant

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. 

pendant

noun
  • A piece of jewellery which hangs down as an ornament, especially worn on a chain around the neck. 

  • A short rope hanging down, used to attach hooks for tackles; a pennant. 

  • A lamp hanging from the roof. 

  • A long narrow flag at the head of the principal mast in a royal ship. 

  • The dangling part of an earring. 

  • An ornament of wood or of stone hanging downwards from a roof. 

  • One of a pair; a counterpart. 

  • A supporting post attached to the main rafter. 

  • The stem and ring of a watch, by which it is suspended. 

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