M vs P

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. 

P

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

name
  • The set of all problems that are solvable in polynomial time by a deterministic Turing machine 

noun
  • A P wave on an electrocardiogram. 

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