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

(661) The Day when a Maula (a near relative) cannot avail a Maula (a near relative) in aught, and no help can they receive,

(662) And when he learns something of Our Verses (this Qur'an), he makes them a jest. For such there will be a humiliating torment.

(663) And when Our Clear Verses are recited to them, their argument is no other than that they say: "Bring back our (dead) fathers, if you are truthful!"

(664) And when it was said: "Verily, Allah's Promise is the truth, and there is no doubt about the coming of the Hour," you said: "We know not what is the Hour: we do not think it but as a conjecture, and we have no firm convincing belief (therein)."

(665) And when mankind are gathered (on the Day of Resurrection), they (false deities) will become their enemies and will deny their worshipping.

(666) And when Our Clear Verses are recited to them, the disbelievers say of the truth (this Qur'an) when it reaches them: "This is plain magic!"

(667) And those who disbelieve (the strong and wealthy) say of those who believe (the weak and poor): "Had it (Islamic Monotheism to which Muhammad صلى الله عليه وسلم is inviting mankind) been a good thing, they (the weak and poor) would not have preceded us thereto!" And when they have not let themselves be guided by it (this Qur'an), they say: "This is an ancient lie!"

(668) And We have enjoined on man to be dutiful and kind to his parents. His mother bears him with hardship. And she brings him forth with hardship, and the bearing of him, and the weaning of him is thirty months, till when he attains full strength and reaches forty years, he says: "My Lord! Grant me the power and ability that I may be grateful for Your Favour which You have bestowed upon me and upon my parents, and that I may do righteous good deeds, such as please You, and make my offspring good. Truly, I have turned to You in repentance, and truly, I am one of the Muslims (submitting to Your Will)."

(669) But he who says to his parents: "Fie upon you both! Do you hold out the promise to me that I shall be raised up (again) when generations before me have passed away (without rising)?" While they (father and mother) invoke Allah for help (and rebuke their son): "Woe to you! Believe! Verily, the Promise of Allah is true." But he says: "This is nothing but the tales of the ancient."

(670) On the Day when those who disbelieve (in the Oneness of Allah - Islamic Monotheism) will be exposed to the Fire (it will be said): "You received your good things in the life of the world, and you took your pleasure therein. Now this Day you shall be recompensed with a torment of humiliation, because you were arrogant in the land without a right, and because you used to rebel against Allah's Command (disobey Allah).