affinity vs separation

affinity

noun
  • The fact of and manner in which something is related to another. 

  • A kinsman or kinswoman of a such relationship; one who is affinal. 

  • The attraction between an antibody and an antigen 

  • An automorphism of affine space. 

  • resemblances between biological populations, suggesting that they have a common origin, type or stock. 

  • A love interest; a paramour. 

  • structural resemblances between minerals; resemblances that suggest that they are of a common origin or type. 

  • An attractive force between atoms, or groups of atoms, that contributes towards their forming bonds 

  • tendency to keep a task running on the same processor in a symmetric multiprocessing operating system to reduce the frequency of cache misses 

  • Any romantic relationship. 

  • A family relationship through marriage of a relative (e.g. sister-in-law), as opposed to consanguinity (e.g. sister). 

  • Any passionate love for something. 

  • A natural attraction or feeling of kinship to a person or thing. 

separation

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

  • 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 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 affinity and separation occurred in a corpus of books? (source: Google Ngram Viewer )