potato bread vs stottie

potato bread

noun
  • A type of bread made with potatoes, often served shallow-fried as part of a cooked breakfast, common in Northern Ireland and Scotland. 

stottie

noun
  • A round flat loaf of bread, traditionally pan-fried rather than oven-baked. 

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