flume vs gullet

flume

noun
  • An open channel or trough used to direct or divert liquids. 

  • A ravine or gorge, usually one with water running through. 

verb
  • To transport (logs of wood) by floating them along a water-filled channel or trough. 

gullet

noun
  • A channel for water. 

  • A preparatory cut or channel in excavations, of sufficient width for the passage of earth wagons. 

  • The throat or esophagus. 

  • The cytopharynx of a ciliate, through which food is ingested. 

  • The space between the teeth of a saw blade. 

  • The wide space under the pommel of a saddle; the hollow over the withers of a saddled animal. 

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