No time frame can be given at this stage as Mian sahib (Sharif) is busy in London looking after his wife. He may return to the country once the chemotherapy of Begum Kulsoom completes (after about three months),

Nawaz Sharif, 2 months
Panama Papers case: Pakistan anti-graft court defers indictment of Nawaz Sharif, Maryam till 19 O...

Nawaz Sharif, 24 days
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Nawaz Sharif, a month
Ousted PM Nawaz Sharif denies deal for his return to Pakistan