6:00 a.m – 10 a.m. — Kapha dominance
10:00 a.m. – 2:00 p.m. — Pitta dominance
2:00 p.m. – 6:00 p.m. — Vata dominance
6:00 p.m. – 10:00 p.m. — Kapha dominance
10:00 p.m. – 2:00 a.m. — Pitta dominance
2:00 a.m. – 6:00 a.m. — Vata dominance

7-15 minutes sound about right. You can do whatever asanas you find most relaxing, nothing too challenging. Consider practising poses like Feet against the wall, Child pose, Reclining bound angle pose (click the name of poses to watch instruction videos). Finish with Balasana and have a great sleep and the sweetest dreams.