carburetor vs spray gun

carburetor

noun
  • A device in an internal combustion engine where fuel is vaporized and mixed with air prior to ignition. 

  • A water pipe or bong; a device or contrivance for mixing air with burning cannabis or cocaine. 

spray gun

noun
  • paint sprayer, powered by compressed air or other gas, larger than an airbrush. 

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