shutoff vs spigot

shutoff

noun
  • A valve used to turn something off. 

  • The act of turning something off. 

spigot

noun
  • A pin or peg used to stop the vent in a cask. 

  • A water tap: a faucet or sillcock. 

  • The plug of a faucet, tap or cock. 

verb
  • To block with a spigot. 

  • To insert (a spigot). 

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