faucet vs turncock

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 

turncock

noun
  • A tap or faucet that regulates the flow of a fluid. 

  • A person employed to turn on the water for the mains, to regulate the fireplugs, etc. for a water company. 

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