M vs N

M

character
  • The thirteenth letter of the English alphabet, called em and written in the Latin script. 

noun
  • the number of minutes a player spent at the crease 

  • Monsieur 

  • A film with the content rating M. 

  • the number of maiden overs bowled 

name
  • Michigan. 

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 

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