c-note vs enclosure

c-note

noun
  • A one-hundred dollar banknote. 

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

enclosure

noun
  • Something enclosed, i.e. inserted into a letter or similar package. 

  • The area of a convent, monastery, etc where access is restricted to community members. 

  • The act of separating and surrounding an area, domain, or amount of something with a barrier. 

  • An area, domain, or amount of something partially or entirely enclosed by barriers. 

  • The act of enclosing, i.e. the insertion or inclusion of an item in a letter or package. 

  • The act of restricting access to ideas, works of art or technologies using patents or intellectual property laws. 

  • The post-feudal process of subdivision of common lands for individual ownership. 

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