butterball vs cleg

butterball

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

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

  • An overweight person. 

  • A turkey. 

cleg

noun
  • A blood-sucking fly of the family Tabanidae; a gadfly, a horsefly. 

  • A light breeze. 

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