He will receive training for exactly 48 mins, since 48mins is the maximum. Every minute he played more has no influence on training.
As long as he played 48+ minutes on a position which is relevant for training (in your example PG, SG or mixture of both) it doesnt matter how long he played on another position. However you should keep in mind that about 55-60mins seems to be perfect for the gameshape of your players.