What is considered "milking" a franchise?

[flagstaad]

bananaking21 said:

Metroid33slayer said:
Those of you lumping in New super mario with Call of duty and Assassins creed are ignorant, New super mario has one iteration per platform where as Call of duty has 8 games so far on xbox360 alone with the 9th surely on it's way and Assassins creed will have 6 by the years end..

but you do realize that 2 new super mario games came out in just a few months last year right?

So Uncharted is also a milked franchise? It also released 2 games months from each other. Uncharted 3 in November 2011 and Uncharted Golden Abyss in February 2012, that is also only 3 months apart.