butterball vs lardo

butterball

noun
  • An overweight person. 

  • A round lump of a coagulated fat used in cooking such as butter, margarine, or a spread 

  • A small North American duck, the bufflehead, Bucephala albeola 

  • A turkey. 

lardo

noun
  • An overweight person. 

  • A type of salumi made by curing strips of fatback with rosemary and other herbs and spices. 

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