brow vs gangboard

brow

noun
  • The hinged part of a landing craft or ferry which is lowered to form a landing platform; a ramp. 

  • The ridge over the eyes; the eyebrow. 

  • A gallery in a coal mine running across the face of the coal. 

  • The forehead. 

  • The first tine of an antler's beam. 

  • The gangway from ship to shore when a ship is lying alongside a quay. 

  • Aspect; appearance. 

  • The projecting upper edge of a steep place such as a hill. 

verb
  • To bound or limit; to be at, or form, the edge of. 

gangboard

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

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

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

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