clustering vs folk

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. 

folk

noun
  • The inhabitants of a region, especially the native inhabitants. 

  • People in general. 

  • One’s relatives, especially one’s parents. 

  • A particular group of people. 

adj
  • Of or pertaining to common people as opposed to ruling classes or elites. 

  • Of or pertaining to the inhabitants of a land, their culture, tradition, or history. 

  • Of or related to local building materials and styles. 

  • Believed or transmitted by the common people; not academically correct or rigorous. 

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