The word(s) "when" appears 708 time(s) in 647 verse(s) in Quran in Abdullah Yusuf Ali translation.

(441) And their predecessors rejected (the Truth); these have not received a tenth of what We had granted to those: yet when they rejected My messengers, how (terrible) was My rejection (of them)!

(442) If thou couldst but see when they will quake with terror; but then there will be no escape (for them), and they will be seized from a position (quite) near.

(443) They swore their strongest oaths by Allah that if a warner came to them, they would follow his guidance better than any (other) of the Peoples: But when a warner came to them, it has only increased their flight (from righteousness),-

(444) If Allah were to punish men according to what they deserve. He would not leave on the back of the (earth) a single living creature: but He gives them respite for a stated Term: when their Term expires, verily Allah has in His sight all His Servants.

(445) when We (first) sent to them two messengers, they rejected them: But We strengthened them with a third: they said, "Truly, we have been sent on a mission to you."

(446) when they are told, "Fear ye that which is before you and that which will be after you, in order that ye may receive Mercy," (they turn back).

(447) And when they are told, "Spend ye of (the bounties) with which Allah has provided you," the Unbelievers say to those who believe: "Shall we then feed those whom, if Allah had so willed, He would have fed, (Himself)?- Ye are in nothing but manifest error."

(448) Further, they say, "when will this promise (come to pass), if what ye say is true?"

(449) The trumpet shall be sounded, when behold! from the sepulchres (men) will rush forth to their Lord!

(450) It will be no more than a single Blast, when lo! they will all be brought up before Us!