In a married life, time has a different discipline.
For my own free time, for learning, reading, etc., here are the allotted free times:
1. Before & after bed time (1-2 hours each).
2. Commuting time (45-50 minutes each trip).
3. Toilet time (5-10 minutes).
4. Time outside: Lunch, etc. (1 hour).
Thus, on the average I have around 6 hours of time to myself. Plan wisely.