The word(s) "when" appears 1006 time(s) in 918 verse(s) in Quran in Muhammad Pickthal translation.

(451) And when Our clear revelations are recited unto them, those who disbelieve say unto those who believe: Which of the two parties (yours or ours) is better in position, and more imposing as an army?

(452) Say: As for him who is in error, the Beneficent will verily prolong his span of life until, when they behold that which they were promised, whether it be punishment (in the world), or the Hour (of doom), they will know who is worse in position and who is weaker as an army.

(453) On the day when We shall gather the righteous unto the Beneficent, a goodly company.

(454) when it is not meet for (the Majesty of) the Beneficent that He should choose a son.

(455) when he saw a fire and said unto his folk: Lo! Wait! I see a fire afar off. Peradventure I may bring you a brand therefrom or may find guidance at the fire.

(456) And when he reached it, he was called by name: O Moses!

(457) when we inspired in thy mother that which is inspired,

(458) when thy sister went and said: Shall I show you one who will nurse him? and we restored thee to thy mother that her eyes might be refreshed and might not sorrow. And thou didst kill a man and We delivered thee from great distress, and tried thee with a heavy trial. And thou didst tarry years among the folk of Midian. Then camest thou (hither) by (My) providence, O Moses,

(459) (Moses) said: Your tryst shall be the day of the feast, and let the people assemble when the sun hath risen high.

(460) He (Moses) said: O Aaron! What held thee back when thou didst see them gone astray,