Briton vs pommy

Briton

noun
  • An inhabitant of Great Britain, particularly (historical) a Celt from the area of Roman Britain or (obsolete) a Welshman. 

  • A citizen of the United Kingdom or (historical, obsolete) its overseas empire. 

pommy

noun
  • A pom; a person of British descent, a Briton; an Englishman. 

adj
  • English; British. 

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