hypodermic vs injector

hypodermic

noun
  • A hypodermic syringe, needle or injection 

adj
  • Of, or relating to the hypodermis, the layer beneath the dermis 

injector

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

  • An object that realizes a dependency injection. 

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

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

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