and- vs i-

and-

prefix
  • A prefix of Old English origin meaning "against", "back", "in return", "away", represented in Modern English by a-, an-, on-, and in altered form by the reverse-action prefix un- (e.g. unbuckle). Also as the initial letter d in dread (< Old English ondrǣdan). 

i-

prefix
  • A form of the prefix in-, used before gn, as in ignoble, ignominy, and ignore. 

  • Alluding to the Internet. 

  • Used to transform English words into words used by Rastafarians with a special meaning. 

  • Alluding to digital devices and computer programs, especially those that are cutting-edge or fashionable, and those from Apple. 

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