What do you think is the most impressive musical output over a period of time a rapper has had?

I may have phrased that question awkwardly. But I was listening to some old lil wayne (and by old i mean mid-late 2000's) and it reminded me that from about 2004-2008 he put out a monumental amount of music. It felt like he had a new mixtape out every other week, and every mixtape had at least a few really good songs and verses. I know he doesn't get a ton of love around here but whatever. Who do you think has had impressive runs like that?