gangboard vs thoroughfare

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. 

thoroughfare

noun
  • An unobstructed waterway allowing passage for ships. 

  • A road open at both ends or connecting one area with another; a highway or main street. 

  • The act of going through; passage; travel, transit. 

  • A passage; a way through. 

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