carburetor vs silencer

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. 

silencer

noun
  • The muffler of an internal combustion engine. 

  • Something that prevents gene expression 

  • Any of various devices to silence the humming noise of telegraph wires 

  • An attachment to a gun or an exhaust pipe that reduces the sound it emits 

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