faucet vs water pipe

faucet

noun
  • An exposed plumbing fitting; a tap or spigot; a regulator for controlling the flow of a liquid from a reservoir. 

  • One or several systems that inject currency into the game's economy, thus controlling or preventing inflation 

water pipe

noun
  • A pipe that is a conduit for water; an essential element of plumbing. 

  • A device for smoking, such as a hookah or bong, in which the smoke is drawn through a container of water before inhaling. 

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