Can one recite the phrase "wa A’jjil Farajahum" OR "Allahuma A’jjil liwayikal Faraj" after Salawaat in :

1. Any part of Namaaz and anytime ?

2. What about after the salawat of Tashahud in 2nd and 4th Rakaat ?

There is no problem in doing so at any point in the prayer if it is done as a dua.