gangboard vs waist

gangboard

noun
  • A board or plank placed within or without the bulwarks of a vessel's waist for lookouts to walk or stand on. 

  • The boards ending the hammock-nettings at either side of the entrance from the accommodation-ladder to the deck. 

  • A board or plank used as a temporary footbridge between a ship and a dockside or any gap such as scaffolding. 

waist

noun
  • The middle portion of the hull of a ship or the fuselage of an aircraft. 

  • That part of the upper deck of a ship between the quarterdeck and the forecastle. 

  • A part of a piece of clothing that covers the waist. 

  • The part of the body between the pelvis and the stomach. 

  • The narrow connection between the thorax and abdomen in certain insects (e.g., bees, ants and wasps). 

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