copula vs junction

copula

noun
  • 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. 

  • The act of copulation; mating. 

junction

noun
  • The act of joining, or the state of being joined. 

  • A point in time between two unrelated consecutive broadcasts. 

  • A place where two things meet, especially where two roads meet. 

  • A place where two or more railways or railroads meet. 

  • The boundary between two physically different materials, especially between conductors, semiconductors, or metals. 

  • The place where a distributary departs from the main stream. 

  • In the Raku programming language, a construct representing a composite of several values connected by an operator. 

  • electrical junction: a point or area where multiple conductors or semiconductors make physical contact. 

  • A kind of symbolic link to a directory. 

verb
  • To form a junction. 

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