articulation vs copula

articulation

noun
  • The manner in which something is articulated (tongued, slurred or bowed). 

  • The interrelation and congruence of the flow of data between financial statements of an entity, especially between the income statement and balance sheet. 

  • The induction of a pupil into a new school or college. 

  • A joint or the collection of joints at which something is articulated, or hinged, for bending. 

  • A manner or method by which elements of a system are connected. 

  • The quality, clarity or sharpness of speech. 

  • The manner in which a phoneme is pronounced. 

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. 

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