copula vs member

copula

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

  • 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. 

  • The act of copulation; mating. 

member

noun
  • A function or piece of data associated with each separate instance of a class. 

  • A file stored within an archive file. 

  • the judge or adjudicator in a consumer court. 

  • The penis. 

  • A part of a whole. 

  • Part of an animal capable of performing a distinct office; an organ; a limb. 

  • One who officially belongs to a group. 

  • An element of a set. 

  • Either of the two parts of an algebraic equation, connected by the equality sign. 

  • A part of a discourse or of a period, sentence, or verse; a clause. 

  • One of the propositions making up a syllogism. 

  • friend 

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