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

(381) And when We said to the angels: Make obeisance to Adam; they made obeisance but Iblis (did it not). He was of the jinn, so he transgressed the commandment of his Lord. What! would you then take him and his offspring for friends rather than Me, and they are your enemies? Evil is (this) change for the unjust.

(382) And on the day when He shall say: Call on those whom you considered to be My associates. So they shall call on them, but they shall not answer them, and We will cause a separation between them.

(383) And nothing prevents men from believing when the guidance comes to them, and from asking forgiveness of their Lord, except that what happened to the ancients should overtake them, or that the chastisement should come face to face with them.

(384) And (as for) these towns, We destroyed them when they acted unjustly, and We have appointed a time for their destruction.

(385) And when Musa said to his servant: I will not cease until I reach the junction of the two rivers or I will go on for years.

(386) So when they had reached the junction of the two (rivers) they forgot their fish, and it took its way into the sea, going away.

(387) But when they had gone farther, he said to his servant: Bring to us our morning meal, certainly we have met with fatigue from this our journey.

(388) He said: Did you see when we took refuge on the rock then I forgot the fish, and nothing made me forget to speak of it but the Shaitan, and it took its way into the river; what a wonder!

(389) So they went (their way) until when they embarked in the boat he made a hole in it. (Musa) said: Have you made a hole in it to drown its inmates? Certainly you have done a grievous thing.

(390) So they went on until, when they met a boy, he slew him. (Musa) said: Have you slain an innocent person otherwise than for manslaughter? Certainly you have done an evil thing.