Joe Average vs lay figure

Joe Average

noun
  • A hypothetical average or generic individual; the common man (or person, by extension). 

lay figure

noun
  • An unimportant person; a character (especially in fiction) lacking individuality. 

  • A jointed model of the human body used by artists, or to display clothes. 

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