boating vs paddlewheel

boating

noun
  • The activity of going out onto a body of water in a boat. 

  • In Persia, a punishment of capital offenders, by laying them on the back in a covered boat, where they are left to perish. 

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