clustering vs convergence

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. 

convergence

noun
  • The merging of distinct technologies, industries, or devices into a unified whole. 

  • The evolution of similar structures or traits in unrelated species in similar environments; convergent evolution. 

  • A meeting place. 

  • The hypothesis that poorer economies' per capita incomes tend to grow faster than richer economies. 

  • The intersection of three electron beams for red, green and blue onto a single pixel in a CRT. 

  • The coordinated focusing of the eyes, especially at short range. 

  • The act of moving toward union or uniformity. 

  • The process or property of approaching some limiting value. 

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