Briton vs Walian

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. 

Walian

noun
  • A Welsh person. 

adj
  • Synonym of Welsh: of or relating to Wales. 

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