Your comment is not accurate. It is also not smart.
Why are you calculating Michigan's 1997 national championship as 1/2, but counting all of OSU's shared championship as 1? For instance, the NCAA officially lists OSU's 1970 title as split with Texas and Notre Dame, 1961 as split with Alabama, 1957 as split with Auburn and 1954 as a split championship with UCLA. So, that means OSU has 4.83333 championships. (counting '54, '57, '61 as half championships, and 1970 as 1/3 of a championship)
Is it really worth nullifying 2.1666666 Buckeye Championships to nullify .5 of Michigan's?
If you count fractions of championships, OSU has 3.333333 more championships than UM since 1948. If you count a championship as a full championship, OSU has 5 more championships than UM since 1948. Your attempt to cheapen Michigan's 1997 title actually reduces the statistical advantage OSU has had since 1948.