lay figure vs worthless person

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. 

worthless person

noun
  • a person of no worth or value; a contemptibly insignificant person 

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