nameword vs so-and-so

nameword

noun
  • A designation or name given to an object, person or location. 

  • A noun. 

so-and-so

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

  • Some thing or things. 

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

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