What is the time frame for Sunan (Sunnah prayers) performed after the obligatory prayer?

Chapter on the Times When Prayer is Prohibited

Al-Mughni

Book of Prayer

Book 3 · Issue 2 · Bab 9

Open in Qurani

Primary text

The time for a Sunnah prayer performed after an obligatory prayer begins upon the completion of that obligatory prayer and concludes upon the exiting of that prayer's designated time.