bottlenose dolphin vs spinner dolphin

bottlenose dolphin

noun
  • One of the species of gray dolphin in the genus Tursiops, between 2 and 4 meters in length inhabiting warm and temperate seas worldwide. 

  • Tursiops truncatus, the common bottlenose dolphin, famous for its presence in aquarium shows. 

spinner dolphin

noun
  • A species of small dolphin (Stenella longirostris). 

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