charley horse vs circumscription

charley horse

noun
  • A muscle cramp, usually in the thigh or leg. 

circumscription

noun
  • An electoral district; used often in texts treating electoral systems in Romance countries. 

  • The definition of what does and does not belong to a given taxon, from a particular taxonomic viewpoint or taxonomic system. 

  • The act of circumscribing or the quality of being circumscribed. 

  • Anything that circumscribes or a circumscribed area. 

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