potato cake vs schnitzel

potato cake

noun
  • A fried potato; a potato scallop. 

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

schnitzel

noun
  • A dish consisting of fried veal cutlet. 

  • A Germanic dish of breaded and deep-fried meat cutlet. 

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