i vs n

i

character

  • The ninth letter of the English alphabet, called i and written in the Latin script. 

noun

  • The name of the Latin-script letter I/i. 

n

character

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

noun

  • noun 

  • Neutral 

  • Shortening of and, used in set phrases like rock-n-roll. 

  • normal 

  • No 

  • neuter gender 

  • north 

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