It makes no difference how a player gets to 48 minutes in a week.
If a player plays 24 minutes in week 1, he receives some proportion of the training, but almost certainly less than 50%.
The following week, he also plays 24 minutes (who is the gm that can only get a guy 24 minutes in three games?). Again he receives less than 50% training.
And so on.
Once I scored a basket that still makes me laugh.