John Citizen vs so-and-so

John Citizen

name

  • Synonym of John Doe 

so-and-so

noun

  • Some thing or things. 

  • Used in place of epithets such as SOB, bastard, etc.. 

  • A placeholder name for a person or thing, used when a name is not known; a generic name. 

How often have the words John Citizen and so-and-so occurred in a corpus of books? (source: Google Ngram Viewer )