How much time should be dedicated to offense, defense, and skill development in a regular season practice?

For us and I know for a few colleges they split the practice about 50/50. Player Development is very important! During the season focusing on developing players to be a start at their role while also focusing on the fundamentals as well. Then using the second half to go through offense and defense and the other things ! Therefore, in my opinion I believe using the first half of practice for skill development and the second half for everything else!