M vs p

M

character

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

name

  • Michigan. 

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 

p

character

  • The sixteenth letter of the English alphabet, called pee and written in the Latin script. 

noun

  • proton 

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