deckhand vs troopship

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. 

troopship

noun
  • A ship used to transport military troops. 

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