Who was Prime Minister of Pakistan for the shortest time period?

Who was Prime Minister of Pakistan for the shortest time period?

سب سے کم مدت کے لیے پاکستان کا وزیراعظم کون رہا؟
Explanation
Nurul Amin was the shortest in Pakistan's history

Serving only 13 days (7 December 1971 to 20 December 1971) of his term.

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The premiership of I. I. Chundrigar was serving only 55 days (17 October 1957 to 16 December 1957) of his term.
Sharif is the longest-serving prime minister.
Sharif was re-elected for a third non-consecutive term on 5 June 2013, which is a record in the history of Pakistan.