sailing ship vs schooner

sailing ship

noun
  • A ship with masts and sails, powered by the wind. 

schooner

noun
  • A sailing ship with two or more masts, all with fore-and-aft sails; if two masted, having a foremast and a mainmast. 

  • A glass for drinking a large measure of sherry. 

  • A covered wagon used by emigrants. 

  • A large goblet or drinking glass, used for lager or ale (Wikipedia). 

  • A glass of beer, of a size which varies between states (Wikipedia). 

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