faucet vs injector

faucet

noun
  • An exposed plumbing fitting; a tap or spigot; a regulator for controlling the flow of a liquid from a reservoir. 

  • One or several systems that inject currency into the game's economy, thus controlling or preventing inflation 

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. 

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