coracle vs dinghy

coracle

noun
  • A small circular or oblong boat made of wickerwork and made watertight with hides or pitch, propelled and steered with a single paddle and light enough to be carried on a person's back. 

dinghy

noun
  • A small open boat, propelled by oars or paddles, carried as a tender, lifeboat, or pleasure craft on a ship. 

  • An inflatable rubber life raft. 

  • A sailing dinghy. 

verb
  • To travel by dinghy. 

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