as in vs v.g.

as in

adv
  • Used other than figuratively or idiomatically: see as, in. 

  • In the sense of. 

v.g.

adv
  • Used to introduce an example or list of examples to illustrate what is being discussed. 

How often have the words as in and v.g. occurred in a corpus of books? (source: Google Ngram Viewer )