pigswill vs suckling pig

pigswill

noun
  • swill: slops fed to pigs 

  • nonsense, rubbish 

suckling pig

noun
  • An unweaned pig, especially one whose carcass is roasted whole on a spit. 

  • The flesh of such a pig cooked and served as a food item. 

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