dinghy vs paddlewheel

dinghy

noun
  • A sailing dinghy. 

  • An inflatable rubber life raft. 

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

verb
  • To travel by dinghy. 

paddlewheel

noun
  • A boat propelled by a paddlewheel. 

  • A large wheel fitted with thick slats, turned by an engine and used to propel a boat. 

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