Yankee vs ante-post bet

Yankee

noun
  • A native or inhabitant of New England. 

  • An Anglo, as opposed to someone with French ancestry; a native or inhabitant of the rest of the United States. 

  • A large triangular headsail used in light or moderate winds and set on the fore topmast stay. Unlike a genoa it does not fill the whole fore triangle, but is set in combination with the working staysail. 

  • A wager on four selections, consisting of 11 separate bets: six doubles, four trebles and a fourfold accumulator. A minimum two selections must win to gain a return. 

  • A native or inhabitant of the United States. 

  • A player that plays for the New York Yankees. 

  • A native or inhabitant of the Northern United States. 

ante-post bet

How often have the words Yankee and ante-post bet occurred in a corpus of books? (source: Google Ngram Viewer )