coupling vs vinculum

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. 

vinculum

noun
  • A bond or link signifying union. 

  • A ligament that limits the movement of an organ or part. 

  • A horizontal line over the top of some of the terms in an expression, indicating that that part of the calculation is to be done before other parts. 

  • Specifically, the horizontal line between the numerator and denominator in a fraction. 

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