American vs American English

American

adj
  • Of, from, or pertaining to the Americas. 

  • Of, from, or pertaining to the United States of America, its people, or its culture. 

  • Able to be exercised on any date between its issue and expiry. 

  • Of, from, or pertaining to British North America. 

noun
  • A citizen or inhabitant of British North America. 

  • The dialect of English spoken in and around the contiguous United States of America. 

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

  • Any inhabitant of the Americas. 

  • American cheese. 

American English

adj
  • Of or relating to, or spoken or written in American English. 

name
  • The form of the English language that is chiefly used in the United States, contrasted with British English or Canadian English and that of other places. 

  • The form of the English language that is chiefly used in North America, contrasted with Commonwealth English (British English and that of other places). 

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