dog bone vs long pig

dog bone

noun
  • a bone that is given to a dog to chew on and play with, similar to a dog biscuit. They can be real bones, or they can be made of other materials like plastic or leather 

  • a 2- or 3-dimensional compound shape, evocative of a dog biscuit or dog-bone toy with a central shaft and two lobes (analogous to femoral condyles) at each end 

  • the penis 

long pig

noun
  • Human flesh used by cannibals as meat. 

How often have the words dog bone and long pig occurred in a corpus of books? (source: Google Ngram Viewer )