deckhand vs roustabout

deckhand

noun
  • A member of the crew of a merchant ship who performs manual labour. 

  • A stagehand. 

verb
  • To work on a boat as a deckhand; crew. 

roustabout

noun
  • an unskilled laborer, especially at an oilfield, at a circus or on a ship, 19th c. 

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