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

(271) And you are not (engaged) in any affair, nor do you recite concerning it any portion of the Quran, nor do you do any work but We are witnesses over you when you enter into it, and there does not lie concealed from your Lord the weight of an atom in the earth or in the heaven, nor any thing less than that nor greater, but it is in a clear book.

(272) And recite to them the story of Nuh when he said to his people: O my people! if my stay and my reminding (you) by the communications of Allah is hard on you-- yet on Allah do I rely-- then resolve upon your affair and (gather) your associates, then let not your affair remain dubious to you, then have it executed against me and give me no respite:

(273) So when the truth came to them from Us they said: This is most surely clear enchantment!

(274) Musa said: Do you say (this) of the truth when it has come to you? Is it magic? And the magicians are not successful.

(275) And when the magicians came, Musa said to them: Cast down what you have to cast.

(276) So when they cast down, Musa said to them: What you have brought is deception; surely Allah will make it naught; surely Allah does not make the work of mischief-makers to thrive.

(277) And We made the children of Israel to pass through the sea, then Firon and his hosts followed them for oppression and tyranny; until when drowning overtook him, he said: I believe that there is no god but He in Whom the children of Israel believe and I am of those who submit.

(278) And wherefore was there not a town which should believe so that their belief should have profited them but the people of Yunus? when they believed, We removed from them the chastisement of disgrace in this world's life and We gave them provision till a time.

(279) Now surely they fold up their breasts that they may conceal (their enmity) from Him; now surely, when they use their garments as a covering, He knows what they conceal and what they make public; surely He knows what is in the breasts.

(280) And if We hold back from them the punishment until a stated period of time, they will certainly say: What prevents it? Now surely on the day when it will come to them, it shall not be averted from them and that which they scoffed at shall beset them.