Brit vs British English

Brit

noun
  • A British person. 

  • A Brit Award, a prize for musicians in Britain. 

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) 

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

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