nozzle vs pipework

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. 

pipework

noun
  • Any system of pipes or tubes; piping 

  • The pipes and stops of an organ 

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