dauphin vs dolphin

dauphin

noun
  • The eldest son of the king of France. Under the Valois and Bourbon dynasties, the Dauphin of France, generally shortened to Dauphin, was heir apparent to the throne of France. The title derived from the main title of the Dauphin, Dauphin of Viennois. 

  • An eldest son. 

dolphin

noun
  • The dauphin, eldest son of the kings of France. 

  • A permanent fender designed to protect a heavy boat or coastal structure from the impact of large floating objects such as ice or floating logs. 

  • A man-made semi submerged maritime structure, usually installed to provide a fixed structure for temporary mooring, to prevent ships from drifting to shallow water or to serve as base for navigational aids. 

  • Tursiops truncatus, (Atlantic bottlenose dolphin) the most well-known species. 

  • A carnivorous aquatic mammal in one of several families of order Cetacea, famed for its intelligence and occasional willingness to approach humans. 

  • A spar or buoy held by an anchor and furnished with a ring to which ships may fasten their cables. 

  • A mooring post on a wharf or beach. 

  • A kind of wreath or strap of plaited cordage. 

  • A mass of iron or lead hung from the yardarm, in readiness to be dropped through the deck and the hull of an enemy's vessel to sink it. 

  • A depiction of a fish, with a broad indented fin, usually embowed. 

  • A fish, the mahi-mahi or dorado, Coryphaena hippurus, with a dorsal fin that runs the length of the body, also known for iridescent coloration. 

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