injector vs nozzle

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. 

nozzle

noun
  • A short outlet or inlet pipe projecting from the end or side of a hollow vessel, as a steam-engine cylinder or a steam boiler. 

  • The nose of an animal; muzzle. 

  • The part of an earbud that accommodates eartips. 

  • A short tube, usually tapering, forming the vent of a hose or pipe. 

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