'Murica vs Yankee land

'Murica

name

  • The United States of America as viewed by the stereotypical southerner or conservative. 

Yankee land

name

  • The United States. 

  • New England. 

  • The northern states region of the United States. 

How often have the words 'Murica and Yankee land occurred in a corpus of books? (source: Google Ngram Viewer )