amphibian vs marine

amphibian

adj
  • Capable of operating on both land and water amphibious. 

  • Of or relating to the class Amphibia. 

noun
  • A vehicle which can operate on land and water. See Wikipedia article on "Amphibious aircraft" 

  • An animal of the Amphibia; any four-legged vertebrate that does not have amniotic eggs, living both on land and in water. 

marine

adj
  • Used or adapted for use at sea. 

  • Belonging to or characteristic of the sea; existing or found in the sea; formed or produced by the sea. 

  • Inhabiting the high seas; oceanic; pelagic. (distinguished from maritime or littoral) 

  • Relating to or connected with the sea (in operation, scope, etc.), especially as pertains to shipping, a navy, or naval forces. 

noun
  • A marine corps. 

  • A painting representing some marine subject. 

  • A soldier, normally a member of a marine corps, trained to serve on board or from a ship 

verb
  • To equip (a boat) with sailors and other personnel required for an ocean voyage. 

  • To temporarily inundate with water and/or other marine substances. 

  • To adapt for use in a marine environment. 

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