Britishism vs anglicism

Britishism

noun
  • A word, phrase, idiom, or expression peculiar to the English language as spoken in Britain. 

  • The practice of British religion or culture. 

anglicism

noun
  • A cultural aspect typical of the English people. 

  • A Briticism: a word or other feature in the English language that is specific to, or characteristic of, British English. 

  • An Englishism: a word or other feature originating in the English language that has been borrowed by another language. 

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