The word(s) "when" appears 926 time(s) in 834 verse(s) in Quran in Muhammad Habib Shakir translation.

(701) And in Samood: when it was said to them: Enjoy yourselves for a while.

(702) On the day when the heaven shall move from side to side

(703) And wait patiently for the judgment of your Lord, for surely you are before Our eyes, and sing the praise of your Lord when you rise;

(704) I swear by the star when it goes down.

(705) when that which covers covered the lote-tree;

(706) Those who keep aloof from the great sins and the indecencies but the passing idea; surely your Lord is liberal in forgiving. He knows you best when He brings you forth from the earth and when you are embryos in the wombs of your mothers; therefore do not attribute purity to your souls; He knows him best who guards (against evil).

(707) From the small seed when it is adapted

(708) So turn (your) back on them (for) the day when the inviter shall invite them to a hard task,

(709) On the day when they shall be dragged upon their faces into the fire; taste the touch of hell.

(710) And when the heaven is rent asunder, and then becomes red like red hide.