nexus vs vinculum

nexus

noun
  • A form or state of connection. 

  • A centre or focus of something. 

  • A person who had contracted a nexum or obligation of such a kind that, if they failed to pay, their creditor could compel them to work as a servant until the debt was paid; an indentured servant. 

  • The relationship between a vendor and a jurisdiction for the purpose of taxation, established for example by the vendor operating a physical store in that jurisdiction. 

  • A connected group; a network, a web. 

  • In the work of the Danish linguist Otto Jespersen (1860–1943): a group of words expressing two concepts in one unit (such as a clause or sentence). 

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