J vs i

J

character

  • The tenth letter of the English alphabet, called jay and written in the Latin script. 

noun

  • In the name of a serial publication: abbreviation of Journal. 

  • (plural Js or J's) an Air Jordan shoe 

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. 

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