Joe Sixpack vs whatshisface

Joe Sixpack

name
  • The average person. 

  • Somebody without particular expertise or interest in computers or the Internet; a nontechie. 

whatshisface

noun
  • A person whose name is either unknown or forgotten 

How often have the words Joe Sixpack and whatshisface occurred in a corpus of books? (source: Google Ngram Viewer )