barque vs scow

barque

noun
  • A sailing vessel or boat of any kind. 

  • A sailing vessel of three or more masts, with all masts but the sternmost square-rigged, the sternmost being fore-and-aft-rigged 

scow

noun
  • A large flat-bottomed boat, having broad, square ends. 

verb
  • To transport in a scow. 

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