breakwater vs pontoon

breakwater

noun
  • A construction in or around a harbour designed to break the force of the sea and to provide shelter for vessels lying inside. 

  • A wooden or concrete barrier, usually perpendicular to the shore, intended to prevent the movement of sand along a coast. 

  • A low bulkhead across the forecastle deck of a ship which diverts water breaking over the bows into the scuppers. 

pontoon

noun
  • A flat-bottomed boat or other floating structure used as a buoyant support for a temporary bridge, dock or landing stage. 

  • A lighter or barge used for loading or unloading ships. 

  • A bridge with floating supports. 

  • A float of a seaplane. 

  • A card game in which the object is to obtain cards whose value adds up to, or nearly to, 21 but not exceed it. 

  • A box used to raise a sunken vessel. 

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