relationship vs vinculum

relationship

noun
  • Connection or association; the condition of being related. 

  • The level or degree of affinity between keys, chords and tones. 

  • The links between the x-values and y-values of ordered pairs of numbers especially coordinates. 

  • Kinship; being related by blood or marriage. 

  • A romantic or sexual involvement. 

  • A way in which two or more people behave and are involved with each other 

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 relationship and vinculum occurred in a corpus of books? (source: Google Ngram Viewer )