The word(s) "when" appears 926 time(s) in 834 verse(s) in Quran in Muhammad Habib Shakir translation.

(641) And certainly We sent apostles before you: there are some of them that We have mentioned to you and there are others whom We have not mentioned to you, and it was not meet for an apostle that he should bring a sign except with Allah's permission, but when the command of Allah came, judgment was given with truth, and those who treated (it) as a lie were lost.

(642) Then when their apostles came to them with clear arguments, they exulted in what they had with them of knowledge, and there beset them that which they used to mock.

(643) But when they saw Our punishment, they said: We believe in Allah alone and we deny what we used to associate with Him.

(644) But their belief was not going to profit them when they had seen Our punishment; (this is) Allah's law, which has indeed obtained in the matter of His servants, and there the unbelievers are lost.

(645) when their apostles came to them from before them and from behind them, saying, Serve nothing but Allah, they said: If our Lord had pleased He would certainly have sent down angels, so we are surely unbelievers in that with which you are sent.

(646) Until when they come to it, their ears and their eyes and their skins shall bear witness against them as to what they did.

(647) And not alike are the good and the evil. Repel (evil) with what is best, when lo! he between whom and you was enmity would be as if he were a warm friend.

(648) And among His signs is this, that you see the earth still, but when We send down on it the water, it stirs and swells: most surely He Who gives it life is the Giver of life to the dead; surely He has power over all things.

(649) Surely those who disbelieve in the reminder when it comes to them, and most surely it is a Mighty Book:

(650) To Him is referred the knowledge of the hour, and there come not forth any of the fruits from their coverings, nor does a female bear, nor does she give birth, but with His knowledge; and on the day when He shall call out to them, Where are (those whom you called) My associates? They shall say: We declare to Thee, none of us is a witness.