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

(531) And who does more wrong than he who invents a lie against Allah or denies the truth (Muhammad صلى الله عليه وسلم and his doctrine of Islamic Monotheism and this Qur'an), when it comes to him? Is there not a dwelling in Hell for disbelievers (in the Oneness of Allah and in His Messenger Muhammad صلى الله عليه وسلم)?

(532) And on the Day when the Hour will be established, the Mujrimun (disbelievers, sinners, criminals, polytheists) will be plunged into destruction with (deep regrets, sorrows, and) despair.

(533) And on the Day when the Hour will be established - that Day shall (all men) be separated (i.e. the believers will be separated from the disbelievers).

(534) So glorify Allah [above all that (evil) they associate with Him (O believers)] when you come up to the evening [i.e. offer the (Maghrib ) sunset and ('Isha') night prayers], and when you enter the morning [i.e. offer the (Fajr) morning prayer].

(535) And His are all the praises and thanks in the heavens and the earth; and (glorify Him) in the afternoon (i.e. offer 'Asr prayer) and when you come up to the time, when the day begins to decline (i.e. offer Zuhr prayer). (Ibn 'Abbas said: "These are the five compulsory congregational prayers mentioned in the Qur'an)." [Tafsir At-Tabari]

(536) And among His Signs is that the heaven and the earth stand by His Command. Then afterwards when He will call you by a single call, behold, you will come out from the earth (i.e. from your graves for reckoning and recompense).

(537) And when harm touches men, they cry sincerely only to their Lord (Allah), turning to Him in repentance; but when He gives them a taste of His Mercy, behold, a party of them associates partners in worship with their Lord.

(538) And when We cause mankind to taste of mercy, they rejoice therein; but when some evil afflicts them because of (evil deeds and sins) that their (own) hands have sent forth, behold, they are in despair!

(539) Allah is He Who sends the winds, so that they raise clouds, and spread them along the sky as He wills, and then break them into fragments, until you see rain drops come forth from their midst! Then when He has made them fall on whom of His slaves as He wills, lo, they rejoice!

(540) So verily, you (O Muhammad صلى الله عليه وسلم) cannot make the dead to hear (i.e. the disbelievers), nor can you make the deaf to hear the call, when they show their backs and turn away.