copula vs scarf

copula

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

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

  • The act of copulation; mating. 

scarf

noun
  • A groove on one side of a sewing machine needle. 

  • A headscarf. 

  • A type of joint in woodworking. 

  • A dip or notch or cut made in the trunk of a tree to direct its fall when felling. 

  • A cormorant. 

  • A long, often knitted, garment worn around the neck. 

verb
  • To throw on loosely; to put on like a scarf. 

  • To unite, as two pieces of timber or metal, by a scarf joint. 

  • To eat very quickly. 

  • To dress with a scarf, or as with a scarf; to cover with a loose wrapping. 

  • To form a scarf on the end or edge of, as for a joint in timber, forming a "V" groove for welding adjacent metal plates, metal rods, etc. 

  • To shape by grinding. 

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