boatman vs sculler

boatman

noun
  • A man in charge of a small boat. 

sculler

noun
  • A boat rowed by one person with two sculls, or short oars. 

  • One who sculls; an athlete who participates in sculling races. 

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