Sheer quantity. I look at it differently. When you lose Wilson, the thing to do is rely on Allgeier more.
I'd bet it's pretty obvious he won't have a paltry 150 carries. Every other thousand yard back at BYU usually took well over 200 carries to reach that. 200 carries at 5 per is 1000 yds. And 200 carries over 13 games ord only 15 per game. That's not a ton, in case CB is still worried about "keeping guys fresh" to the point of hardly using them.