coggle vs paddlewheel

coggle

noun
  • A small fishing boat. 

  • cobble (all senses) 

verb
  • To move or walk unsteadily 

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 coggle and paddlewheel occurred in a corpus of books? (source: Google Ngram Viewer )