pommy vs sassenach

pommy

noun

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

adj

  • English; British. 

sassenach

noun

  • An English person. 

  • A Lowland Scot. 

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