Z-list vs rabble

Z-list

noun
  • A group of people who are the furthest from stardom, unlike the A-list. 

rabble

noun
  • An iron bar used in puddling. 

  • A mob; a disorderly crowd. 

  • The mass of common people; the lowest class of populace. 

verb
  • To speak confusedly or incoherently; gabble or chatter out 

  • To stir with a rabble. 

  • To speak in a confused manner; talk incoherently; utter nonsense 

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