coupling vs separation

coupling

noun
  • Act of joining together to form a couple. 

  • The property of physical systems that they are interacting with each other 

  • Sexual intercourse. 

  • A device that couples two things together. 

  • The degree of reliance between two or more software modules. 

  • A connection between two electronic circuits such that a signal can pass between them. 

separation

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

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