absorption vs clustering

absorption

noun
  • Mental assimilation. 

  • Entire engrossment or occupation of the mind. 

  • The retaining of electrical energy for a short time after it has been introduced to the dielectric. 

  • in living organisms, the process by which the materials of growth and nutrition are absorbed and conveyed to the tissues and organs; taking in by various means, such as by osmosis. 

  • the imbibing or reception by molecular or chemical action, of radiant energy; the process of being neutrons being absorbed by the nucleus; interception. 

  • The process in which incident radiant energy is retained by a substance (such as an air mass) by conversion to some other form of energy (such as heat). 

  • assimilation; incorporation. 

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. 

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