barnacle vs foot passenger

barnacle

noun
  • A worldly sailor. 

  • In electrical engineering, a change made to a product on the manufacturing floor that was not part of the original product design. 

  • A deprecated or obsolete file, image or other artifact that remains with a project even though it is no longer needed. 

  • On printed circuit boards, a change such as soldering a wire in order to connect two points, or addition such as an added resistor or capacitor, subassembly or daughterboard. 

  • The barnacle goose. 

  • A marine crustacean of the subclass Cirripedia that attaches itself to submerged surfaces such as tidal rocks or the bottoms of ships. 

verb
  • To connect with or attach. 

  • To press close against something. 

foot passenger

noun
  • A passenger on a ferry who does not have a car, or any other form of transport, with them. 

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