injector vs spigot

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. 

spigot

noun
  • A water tap: a faucet or sillcock. 

  • The plug of a faucet, tap or cock. 

  • A pin or peg used to stop the vent in a cask. 

verb
  • To block with a spigot. 

  • To insert (a spigot). 

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