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

(361) (And remember) the Day when We shall call together call human beings with their (respective) Imam [their Prophets, or their records of good and bad deeds, or their Holy Books like the Qur'an, the Taurat (Torah), the Injeel (Gospel), the leaders whom the people followed in this world.]. So whosoever is given his record in his right hand, such will read their records, and they will not be dealt with unjustly in the least.

(362) And when We bestow Our Grace on man (the disbeliever), he turns away and becomes arrogant (far away from the Right Path). And when evil touches him, he is in great despair.

(363) And nothing prevented men from believing when the guidance came to them, except that they said: "Has Allah sent a man as (His) Messenger?"

(364) And he whom Allah guides, he is led aright; but he whom He sends astray, for such you will find no Auliya' (helpers and protectors), besides Him, and We shall gather them together on the Day of Resurrection on their faces, blind, dumb and deaf; their abode will be Hell; whenever it abates, We shall increase for them the fierceness of the Fire.

(365) That is their recompense, because they denied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and said: "when we are bones and fragments, shall we really be raised up as a new creation?"

(366) And indeed We gave Musa (Moses) nine clear signs. Ask then the Children of Israel, when he came to them, then Fir'aun (Pharaoh) said to him: "O Musa (Moses)! I think you are indeed bewitched."

(367) And We said to the Children of Israel after him: "Dwell in the land, then, when the final and the last promise comes near [i.e. the Day of Resurrection or the descent of Christ ['Îsa (Jesus), son of Maryam (Mary) عليهما السلام on the earth], We shall bring you altogether as mixed crowd (gathered out of various nations). (Tafsir Al-Qurtubi,).

(368) Say (O Muhammad صلى الله عليه و سلم to them): "Believe in it (the Qur'an) or do not believe (in it). Verily those who were given knowledge before it (the Jews and the Christians like 'Abdullah bin Salam and Salman Al-Farisi), when it is recited to them, fall down on their faces in humble prostration."

(369) (Remember) when the young men fled for refuge (from their disbelieving folk) to the Cave. They said: "Our Lord! Bestow on us mercy from Yourself, and facilitate for us our affair in the right way!"

(370) And We made their hearts firm and strong (with the light of Faith in Allah and bestowed upon them patience to bear the separation of their kith and kin and dwellings) when they stood up and said: "Our Lord is the Lord of the heavens and the earth, never shall we call upon any ilah (god) other than Him; if we did, we should indeed have uttered an enormity in disbelief.