hydrant vs nozzle

hydrant

noun
  • An outlet from a liquid/fluid main often consisting of an upright pipe with a valve attached from which fluid (e.g. water or fuel) can be tapped. 

nozzle

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

  • The nose of an animal; muzzle. 

  • The part of an earbud that accommodates eartips. 

  • 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. 

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