lay figure vs scumbug

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. 

scumbug

noun
  • A sleazy, disreputable or despicable person; lowlife. 

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