Mom and Pop vs corporation

Mom and Pop

corporation

noun
  • The municipal governing body of a borough or city. 

  • In Fascist Italy, a joint association of employers' and workers' representatives. 

  • A body corporate, created by law or under authority of law, having a continuous existence independent of the existences of its members, and powers and liabilities distinct from those of its members. 

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