c-note vs hundredweight

c-note

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

  • A one-hundred dollar banknote. 

hundredweight

noun
  • Various units of ancient measurement systems consisting of 100 units usually translated as "pounds". 

  • A unit of measurement containing 112 avoirdupois pounds (8 st or 51 kg). 

  • Synonym of quintal, a unit of measurement containing various amounts depending on the objects weighed. 

  • A unit of measurement containing 100 avoirdupois pounds (45.5 kg). 

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