clustering vs consolidation

clustering

noun
  • A grouping of a number of similar things. 

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

  • 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. 

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

adj
  • Forming a cluster. 

consolidation

noun
  • The combination of several actions into one. 

  • A solidification into a firm dense mass. It is usually applied to induration (swelling or hardening of normally soft tissue) of a normally aerated lung. 

  • The act or process of consolidating, making firm, or uniting; the state of being consolidated 

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