injector vs pastry bag

injector

noun
  • An apparatus by which a stream of water is forced into a steam boiler. 

  • An object that realizes a dependency injection. 

  • One who injects (himself or herself with) psychoactive drugs. 

  • Any of various devices that are used to inject something. 

pastry bag

noun
  • A flexible bag from which icing is forced through a small nozzle to make various designs of piping. 

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