D vs c-note

D

noun
  • The semicircle on the baulk line, inside which the cue ball must be placed at a break-off. 

  • The penalty arc on a football pitch. 

  • Canonical decomposition 

  • A grade awarded for a class, better than outright failure (which can be F or E depending on the institution) and worse than a C. 

name
  • A programming language inspired from C++. 

  • The City of Detroit. 

adv
  • down (direction). 

character
  • The fourth letter of the English alphabet, called dee and written in the Latin script. 

intj
  • Damn 

adj
  • divorced. 

c-note

noun
  • The lowest note of an instrument, written below the staff and the D note. 

  • A one-hundred dollar banknote. 

How often have the words D and c-note occurred in a corpus of books? (source: Google Ngram Viewer )