O vs i

O

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

particle
  • The English vocative particle, used for direct address. 

name
  • A surname from Korean. 

noun
  • Orgasm. 

  • The number of overs bowled. 

  • American Library Association abbreviation of octavo, a book size (20-25 cm). 

  • Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc. 

  • Opium. 

  • Something shaped like the letter O. 

  • A blood type that lacks A or B antigens and may only receive transfusions of similar type O blood, but may donate to all (neglecting Rh factor). Synonym: universal donor. 

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 O and i occurred in a corpus of books? (source: Google Ngram Viewer )