potato bread vs tattie scone

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. 

tattie scone

noun
  • A scone made from mashed, boiled potatoes and flour, often baked in a large circular shape on a griddle and cut into slices for serving; it may be eaten as an accompaniment to savoury food such as bacon, fried eggs, and Lorne sausage, or with jam. 

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