The word(s) "when" appears 916 time(s) in 828 verse(s) in Quran in Mohsin Khan translation.

(151) So, when they forgot (the warning) with which they had been reminded, We opened for them the gates of every (pleasant) thing, until in the midst of their enjoyment in that which they were given, all of a sudden, We took them (in punishment), and lo! They were plunged into destruction with deep regrets and sorrows.

(152) And warn therewith (the Qur'an) those who fear that they will be gathered before their Lord, when there will be neither a protector nor an intercessor for them besides Him, so that they may fear Allah and keep their duty to Him (by abstaining from committing sins and by doing all kinds of good deeds which He has ordained).

(153) when those who believe in Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) come to you, say: "Salamun 'Alaikum" (peace be on you); your Lord has written (prescribed) Mercy for Himself, so that if any of you does evil in ignorance, and thereafter repents and does righteous good deeds (by obeying Allah), then surely, He is Oft-Forgiving, Most Merciful.

(154) It is He Who takes your souls by night (when you are asleep), and has knowledge of all that you have done by day, then He raises (wakes) you up again that a term appointed (your life period) be fulfilled, then (in the end) unto Him will be your return. Then He will inform you of that which you used to do.

(155) He is the Irresistible, (Supreme) over His slaves, and He sends guardians (angels guarding and writing all of one's good and bad deeds) over you, until when death approaches one of you, Our Messengers (angel of death and his assistants) take his soul, and they never neglect their duty.

(156) Say (O Muhammad صلى الله عليه وسلم): "Who rescues you from the darkness of the land and the sea (dangers like storms), (when) you call upon Him in humility and in secret (saying): If He (Allah) only saves us from this (danger), we shall truly be grateful."

(157) And when you (Muhammad صلى الله عليه وسلم) see those who engage in a false conversation about Our Verses (of the Qur'an) by mocking at them, stay away from them till they turn to another topic. And if Shaitan (Satan) causes you to forget, then after the remembrance sit not you in the company of those people who are the Zalimun (polytheists and wrong-doers).

(158) And leave alone those who take their religion as play and amusement, and whom the life of this world has deceived. But remind (them) with it (the Qur'an) lest a person be given up to destruction for that which he has earned, when he will find for himself no protector or intercessor besides Allah, and even if he offers every ransom, it will not be accepted from him. Such are they who are given up to destruction because of that which they have earned. For them will be a drink of boiling water and a painful torment because they used to disbelieve.

(159) It is He Who has created the heavens and the earth in truth, and on the Day (i.e. the Day of Resurrection) He will say: "Be!", - and it is! His Word is the Truth. His will be the dominion on the Day when the Trumpet will be blown. All-Knower of the unseen and the seen. He is the All-Wise, Well-Aware (of all things).

(160) And (remember) when Ibrahim (Abraham) said to his father Azar: "Do you take idols as alihah (gods)? Verily, I see you and your people in manifest error. "