e.g. vs namely

e.g.

adv

  • "for example" or "for the sake of an example": used to introduce an illustrative example or short list of examples. 

noun

  • An example. 

namely

adv

  • Specifically; that is to say. 

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