c-note vs thou

c-note

noun
  • A one-hundred dollar banknote. 

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

thou

noun
  • A thousand, especially a thousand of some currency (dollars, pounds sterling, etc.). 

  • A unit of length equal to one-thousandth of an inch (25.4 µm). 

verb
  • To use the word thou. 

  • To address (a person) using the pronoun thou, especially as an expression of contempt or familiarity. 

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