convergence vs separation

convergence

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

  • The act of moving toward union or uniformity. 

  • The process or property of approaching some limiting value. 

separation

noun
  • Departure from active duty, while not necessarily leaving the service entirely. 

  • An agreement legalizing such an arrangement. 

  • An object that separates two spaces. 

  • The act of disuniting two or more things, or the condition of being separated. 

  • The act or condition of two or more people being separated from one another. 

  • The place at which a division occurs. 

  • An interval, gap or space that separates things or people. 

  • The act or condition of a married couple living in separate homes while remaining legally married. 

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