guild vs mom and pop

guild

noun
  • A corporation. 

  • A group or association mainly of tradespeople made up of merchants, craftspeople, or artisans for mutual aid, particularly in the Middle Ages. 

  • A group of diverse species that share common characteristics or habits. 

  • An organized group of players who regularly play together in a multiplayer game. 

mom and pop

noun
  • A small business, often but not always owned or operated by a family. 

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