separation vs symbiosis

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. 

symbiosis

noun
  • The occurrence of two different or opposing things in the same time and place. 

  • A close, prolonged association between two or more organisms of different species, regardless of benefit to the members. 

  • A close, prolonged association between two or more organisms of different species that normally benefits both members. An interspecies cooperation. 

  • The state of people of different types, races, cultures, communities, etc., living together. 

  • A relationship of mutual benefit, especially among different species. 

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