copula vs cord

copula

noun
  • The act of copulation; mating. 

  • A word, usually a verb, used to link the subject of a sentence with a predicate (usually a subject complement or an adverbial), that unites or associates the subject with the predicate. 

  • A device that connects two or more keyboards of an organ. 

  • A function that represents the association between two or more variables, independent of the individual marginal distributions of the variables. 

cord

noun
  • Any influence by which persons are caught, held, or drawn, as if by a cord. 

  • A long, thin, flexible length of twisted yarns (strands) of fiber (rope, for example); (uncountable) such a length of twisted strands considered as a commodity. 

  • A unit of measurement for firewood, equal to 128 cubic feet (4 × 4 × 8 feet), composed of logs and/or split logs four feet long and none over eight inches diameter. It is usually seen as a stack four feet high by eight feet long. 

  • Any structure having the appearance of a cord, especially a tendon or nerve. 

  • A small flexible electrical conductor composed of wires insulated separately or in bundles and assembled together usually with an outer cover; the electrical cord of a lamp, sweeper ((US) vacuum cleaner), or other appliance. 

verb
  • To arrange (wood, etc.) in a pile for measurement by the cord. 

  • To furnish with cords 

  • To tie or fasten with cords 

  • To flatten a book during binding 

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