once a player gets 48 minute he gets 100% of training... it doesn't matter if he gets 48 or 68, it's the same
with three games you can give 5 players full training if you train two positions (well six if in 3 games you put no replacements on the position you train, but that's risky for the game result, injuries and they can foul out)
3 games is always better for training than two