United Statian vs Yank

United Statian

noun

  • A citizen or inhabitant of the United States. 

adj

  • Pertaining to the United States. 

Yank

noun

  • An American: someone from the United States. 

  • A Yankee, a Northerner: someone from the Northern United States, especially from New England. 

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