black pudding vs frankfurter

black pudding

noun
  • A blood sausage made from pork blood, a high proportion of cereal (oats or barley), and spices; eaten at breakfast and combined in starters and salads. 

frankfurter

noun
  • A moist sausage of soft, even texture and flavor, often made from mechanically recovered meat or meat slurry. 

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