footlong vs pigs in a blanket

footlong

noun

  • A hot dog or submarine sandwich measuring a foot in length. 

adj

  • One foot long. 

pigs in a blanket

noun

  • a dish of ground pork and/or beef cooked in cabbages 

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