1
Oklahoma has 7 Big 12 Championships
Nebraska won 29 Big 8 championships (24 outright and 5 as co-champion) and, prior to the 2010 championship game that Nebraska will play in, 2 Big 12 championships.
12
The Bulldogs have won two consensus NCAA Division 1-A college football National Championships and 12 Southeastern Conference championships.
12
One.
7
The Oklahoma Sooners have won eight Big 12 Conference championships, in 2000,2002,2004,2006,2007,2008,2010, and 2012 (with Kansas State.)
Alabama
Assuming you mean football..FSU has won/shared 12 ACC championships.
As of October 2023, the SEC has won significantly more NCAA championships compared to the Big 12. The SEC boasts over 100 NCAA titles across various sports, particularly excelling in football and basketball. In contrast, the Big 12 has secured around 30 NCAA championships. This disparity highlights the SEC's dominance in collegiate athletics.
The Big XII has won 3 national championships.