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

(281) We destroyed the generations before you when they did wrong; and their messengers (from Allah) came unto them with clear proofs (of His Sovereignty) but they would not believe. Thus do We reward the guilty folk.

(282) And when Our clear revelations are recited unto them, they who look not for the meeting with Us say: Bring a Lecture other than this, or change it. Say (O Muhammad): It is not for me to change it of my accord. I only follow that which is inspired in me. Lo! if I disobey my Lord I fear the retribution of an awful Day.

(283) And when We cause mankind to taste of mercy after some adversity which had afflicted them, behold! they have some plot against Our revelations. Say: Allah is more swift in plotting. Lo! Our messengers write down that which ye plot.

(284) He it is Who maketh you to go on the land and the sea till, when ye are in the ships and they sail with them with a fair breeze and they are glad therein, a storm-wind reacheth them and the wave cometh unto them from every side and they deem that they are overwhelmed therein; (then) they cry unto Allah, making their faith pure for Him only: If Thou deliver us from this, we truly will be of the thankful.

(285) Yet when He hath delivered them, behold! they rebel in the earth wrongfully. O mankind! Your rebellion is only against yourselves. (Ye have) enjoyment of the life of the world; then unto Us is your return and We shall proclaim unto you what ye used to do.

(286) The similitude of the life of the world is only as water which We send down from the sky, then the earth's growth of that which men and cattle eat mingleth with it till, when the earth hath taken on her ornaments and is embellished, and her people deem that they are masters of her, Our commandment cometh by night or by day and We make it as reaped corn as if it had not flourished yesterday. Thus do we expound the revelations for people who reflect.

(287) On the day when We gather them all together, then We say unto those who ascribed partners (unto Us): Stand back, ye and your (pretended) partners (of Allah)! And We separate them, the one from the other, and their (pretended) partners say: It was not us ye worshipped.

(288) And on the day when He shall gather them together, (when it will seem) as though they had tarried but an hour of the day, recognising one another, those will verily have perished who denied the meeting with Allah and were not guided.

(289) And for every nation there is a messenger. And when their messenger cometh (on the Day of Judgment) it will be judged between them fairly, and they will not be wronged.

(290) And they say: when will this promise be fulfilled, if ye are truthful?