potato cake vs tattie scone

potato cake

noun
  • A savoury flat cake made from flour and mashed potatoes, often fried or baked. 

  • A fried potato; a potato scallop. 

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 cake and tattie scone occurred in a corpus of books? (source: Google Ngram Viewer )