Timing of Nawafil Prayers

[AhmadM]

Salaam Aleikum, 

   As far as I know, if one wishes to pray the nafilah prayers for Dhuhr and Asr, then he/she should begin with nawafil Dhuhr, Dhuhr, nawafil Asr, then Asr. However, I was wondering if it is possible to first pray Dhuhr and Asr, then Nafilah Dhuhr and Nafilah Asr. That is because I heard that we should pray the wajib prayers before the Nafilah.

Thank you all, and may Allah bless you. 

[Hassan-]

776. The Zuhr Nafilah is offered before Zuhr prayers. Its time is from the commencement of the time of Zuhr, up to the time when the shadow of indicator equals 2/7th of its length. For example, if an indicator is 7 yards long, and the shadow appearing after Zuhr reaches 2 yards, the Nafilah time would end. He should now offer Zuhr prayers. 

777. The Asr Nafilah are offered before Asr prayers, and its time is till the moment when the shadow of an indicator appearing after Zuhr, reaches of 4/7th of its length. 
In case a person wishes to offer Zuhr and Asr Nafilah after their recommended time, he can offer the Zuhr Nafilah after Zuhr prayers, and the Asr Nafilah after Asr prayers, but as a precaution, he will not make niyyat of Ada or Qadha.

[Ron_Burgundy]

[AhmadM]

On August 17, 2017 at 3:50 AM, Hassan- said:

he will not make niyyat of Ada or Qadha.

What does this mean?

[Hassan-]

22 minutes ago, AhmadM said:

What does this mean?

I believe it means that when you pray the nawafil prayer after the obligatory prayers, your niyah should be for nawafil and not as ada (an obligatory prayer) or qada (repeating a missed prayer).