Murican vs USAian

Murican

adj

  • American (of the USA). 

noun

  • An American (inhabitant of the USA). 

name

  • American English 

USAian

adj

  • Of or pertaining to the United States. 

noun

  • A citizen or resident of the United States. 

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