USAian vs United Statian

USAian

noun

  • A citizen or resident of the United States. 

adj

  • Of or pertaining to the United States. 

United Statian

noun

  • A citizen or inhabitant of the United States. 

adj

  • Pertaining to the United States. 

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