If a person misses several Salaahs, as far as possible he should make Qada of all. If it is possible, he should make an effort to offer all of them at one time. It is not necessary that the Qada of Zuhr be offered in Zuhr time or that the Qada of Asr be offered at Asr time. If he has to make Qada for several months or several years, as far as possible he should make Qada of them as quickly as possible. He should try and offer several Qada Salaahs in one Salaah time. However, if he is compelled or has no alternative, he should offer one Qada Salaah in one Salaah time. But this is the minimum.
~ HEAVENLY ORNAMENTS ~