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

(241) when He made the slumber fall upon you as a reassurance from him and sent down water from the sky upon you, that thereby He might purify you, and remove from you the fear of Satan, and make strong your hearts and firm (your) feet thereby.

(242) when thy Lord inspired the angels, (saying): I am with you. So make those who believe stand firm. I will throw fear into the hearts of those who disbelieve. Then smite the necks and smite of them each finger.

(243) O ye who believe! when ye meet those who disbelieve in battle, turn not your backs to them.

(244) Ye (Muslims) slew them not, but Allah slew them. And thou (Muhammad) threwest not when thou didst throw, but Allah threw, that He might test the believers by a fair test from Him. Lo! Allah is Hearer, Knower.

(245) O ye who believe! Obey Allah and His messenger, and turn not away from him when ye hear (him speak).

(246) O ye who believe! Obey Allah, and the messenger when He calleth you to that which quickeneth you, and know that Allah cometh in between the man and his own heart, and that He it is unto Whom ye will be gathered.

(247) And remember, when ye were few and reckoned feeble in the land, and were in fear lest men should extirpate you, how He gave you refuge, and strengthened you with His help, and made provision of good things for you, that haply ye might be thankful.

(248) And when those who disbelieve plot against thee (O Muhammad) to wound thee fatally, or to kill thee or to drive thee forth; they plot, but Allah (also) plotteth; and Allah is the best of plotters.

(249) And when Our revelations are recited unto them they say: We have heard. If we wish we can speak the like of this. Lo! this is naught but fables of the men of old.

(250) And when they said: O Allah! If this be indeed the truth from Thee, then rain down stones on us or bring on us some painful doom!