diddley bow vs jitterbug

diddley bow

noun
  • A one-stringed instrument (monochord) that consists of a wire string attached to something solid like the side of a house, and played with a piece of metal or glass, originating in the African American traditional music of Mississippi in the United States. 

jitterbug

noun
  • Synonym of diddley bow (“type of stringed instrument”) 

  • An uptempo jazz or swing dance which embellishes on the two-step pattern and frequently incorporates acrobatic style swing steps. 

  • A jazz musician or aficionado. 

  • A nervous or jittery person. 

verb
  • To dance the jitterbug. 

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