ejector vs injector

ejector

noun
  • One who, or that which, ejects or dispossesses. 

  • That part of the mechanism of a breech-loading firearm which ejects the empty shell. 

  • A lever for removing circuit boards from an electronic chassis. 

  • ejector seat: a pilot's seat in an airplane that can be forcibly ejected in the case of an emergency; then the pilot descends by parachute. 

  • A jet jump for lifting water or withdrawing air from a space. 

injector

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

  • An object that realizes a dependency injection. 

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

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

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