N vs c

N

character

  • The fourteenth letter of the English alphabet, called en and written in the Latin script. 

noun

  • north (see also n) 

  • navy 

  • knight 

  • noun 

c

character

  • The third letter of the English alphabet, called cee and written in the Latin script. 

noun

  • The middle tone in either one of the sets of seven white keys on a keyboard or a set of seven strings on a stringed instrument. 

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