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

(11) And fear a Day (of Judgement) when a person shall not avail another, nor will intercession be accepted from him nor will compensation be taken from him nor will they be helped.

(12) And (remember) when We delivered you from Fir'aun's (Pharaoh) people, who were afflicting you with a horrible torment, killing your sons and sparing your women, and therein was a mighty trial from your Lord.

(13) And (remember) when We separated the sea for you and saved you and drowned Fir'aun's (Pharaoh) people while you were looking (at them, when the sea-water covered them).

(14) And (remember) when We appointed for Musa (Moses) forty nights, and (in his absence) you took the calf (for worship), and you were Zalimun (polytheists and wrong-doers).

(15) And (remember) when We gave Musa (Moses) the Scripture [the Taurat (Torah)] and the criterion (of right and wrong) so that you may be guided aright."

(16) And (remember) when Musa (Moses) said to his people: "O my people! Verily, you have wronged yourselves by worshipping the calf. So turn in repentance to your Creator and kill yourselves (the innocent kill the wrongdoers among you), that will be better for you with your Creator." Then He accepted your repentance. Truly, He is the One Who accepts repentance, the Most Merciful.

(17) And (remember) when you said: "O Musa (Moses)! We shall never believe in you until we see Allah plainly." But you were seized with a thunder-bolt (lightning) while you were looking.

(18) And (remember) when We said: "Enter this town (Jerusalem) and eat bountifully therein with pleasure and delight wherever you wish, and enter the gate in prostration (or bowing with humility) and say: 'Forgive us,' and We shall forgive you your sins and shall increase (reward) for the good-doers."

(19) And (remember) when Musa (Moses) asked for water for his people, We said: "Strike the stone with your stick." Then gushed forth therefrom twelve springs. Each (group of) people knew its own place for water. "Eat and drink of that which Allah has provided and do not act corruptly, making mischief on the earth."

(20) And (remember) when you said, "O Musa (Moses)! We cannot endure one kind of food. So invoke your Lord for us to bring forth for us of what the earth grows, its herbs, its cucumbers, its Fum (wheat or garlic), its lentils and its onions." He said, "Would you exchange that which is better for that which is lower? Go you down to any town and you shall find what you want!" And they were covered with humiliation and misery, and they drew on themselves the Wrath of Allah. That was because they used to disbelieve the Ayat (proofs, evidence, verses, lessons, signs, revelations etc.) of Allah and killed the Prophets wrongfully. That was because they disobeyed and used to transgress the bounds (in their disobedience to Allah, i.e. commit crimes and sins).