charley horse vs constipation

charley horse

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

constipation

noun
  • The act of crowding anything into a lesser space, or the state of being crowded or pressed together; condensation. 

  • A state of the bowels in which the evacuations are infrequent and difficult, or the intestines become filled with hardened faeces 

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