clustering vs rabble

clustering

noun
  • The grouping of a population based on ethnicity, economics or religion. 

  • The undesirable contiguous grouping of elements in a hash table. 

  • A grouping of a number of similar things. 

  • A prewriting technique consisting of writing ideas down on a sheet of paper around a central idea within a circle, with the related ideas radially joined to the circle using rays. 

adj
  • Forming a cluster. 

rabble

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

  • An iron bar used in puddling. 

  • A mob; a disorderly crowd. 

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 clustering and rabble occurred in a corpus of books? (source: Google Ngram Viewer )