Murican vs US-ian

Murican

adj

  • American (of the USA). 

noun

  • An American (inhabitant of the USA). 

name

  • American English 

US-ian

adj

  • Of or pertaining to the United States of America. 

noun

  • An inhabitant or citizen of the United States of America. 

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