segregation vs unification

segregation

noun
  • The separation of people (geographically, residentially, or in businesses, public transit, etc) into racial or other categories (e.g. religion, sex). 

  • The setting apart in Mendelian inheritance of alleles, such that each parent passes only one allele to its offspring. 

  • The setting apart or separation of things or people, as a natural process, a manner of organizing people that may be voluntary or enforced by law. 

  • Separation from a mass, and gathering about centers or into cavities at hand through cohesive or adhesive attraction or the crystallizing process. 

  • The separation of a pair of chromatids or chromosomes during mitosis and meiosis 

  • The separation of people (geographically, residentially, or in businesses, public transit, etc) into various categories which occurs due to social forces (culture, etc). 

unification

noun
  • Given two terms, their join with respect to a specialisation order. 

  • The act of unifying. 

  • The state of being unified. 

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