Is it recommended to pray extensively between Dhuhr and Asr, and what is the recommended number of cycles (rak'ahs)?

The most that has been narrated from the Prophet, peace and blessings be upon him, regarding prayer after Dhuhr is four rak'ahs, as he said: "Whoever prays four before Dhuhr and four after it, the Fire will not touch him." Absolute supererogatory prayer has a wide scope, and prayer is the best deed. The Prophet, peace and blessings be upon him, advised Rabi'ah al-Aslami to prostrate frequently. So, whoever prays much between Dhuhr and Asr has done good, for voluntary prayer is desirable at all times except during the forbidden times.