Joe Nobody vs chopped liver

Joe Nobody

noun
  • Somebody of no importance or significance. 

chopped liver

noun
  • A Jewish pâté-like food made by mincing beef or chicken liver and onions which have been broiled or fried in schmaltz (“chicken fat”) together with hard-boiled eggs; it is usually spread on to bread. 

  • A person or object not worthy of being noticed; someone or something insignificant. 

How often have the words Joe Nobody and chopped liver occurred in a corpus of books? (source: Google Ngram Viewer )