British English vs North American English

British English

adj

  • Of or relating to, or spoken or written in British English. 

noun

  • The English language as written and spoken in the United Kingdom (in contrast with other places, particularly other countries where English is predominant or at least an important language) 

North American English

name

  • The variety of the English language used in the United States of America and Canada. 

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