Coke vs c-note

Coke

noun
  • Cola-based soft drink; (in particular) Coca-Cola. 

  • A bottle, glass or can of Coca-Cola or a cola-based soft drink. 

  • Any soft drink, regardless of type. 

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 Coke and c-note occurred in a corpus of books? (source: Google Ngram Viewer )