The word(s) "when" appears 1006 time(s) in 918 verse(s) in Quran in Muhammad Pickthal translation.

(681) And they esteem not Allah as He hath the right to be esteemed, when the whole earth is His handful on the Day of Resurrection, and the heavens are rolled in His right hand. Glorified is He and High Exalted from all that they ascribe as partner (unto Him).

(682) And those who disbelieve are driven unto hell in troops till, when they reach it and the gates thereof are opened, and the warders thereof say unto them: Came there not unto you messengers of your own, reciting unto you the revelations of your Lord and warning you of the meeting of this your Day? they say: Yea, verily. But the word of doom of disbelievers is fulfilled.

(683) And those who keep their duty to their Lord are driven unto the Garden in troops till, when they reach it, and the gates thereof are opened, and the warders thereof say unto them: Peace be unto you! Ye are good, so enter ye (the Garden of delight), to dwell therein;

(684) Lo! (on that day) those who disbelieve are informed by proclamation: Verily Allah's abhorrence is more terrible than your abhorrence one of another, when ye were called unto the faith but did refuse.

(685) (It is said unto them): This is (your plight) because, when Allah only was invoked, ye disbelieved, but when some partner was ascribed to Him ye were believing. But the command belongeth only to Allah, the Sublime, the Majestic.

(686) The day when they come forth, nothing of them being hidden from Allah. Whose is the Sovereignty this day? It is Allah's, the One, the Almighty.

(687) Warn them (O Muhammad) of the Day of the approaching (doom), when the hearts will be choking the throats, (when) there will be no friend for the wrong-doers, nor any intercessor who will be heard.

(688) And when he brought them the Truth from Our presence, they said: Slay the sons of those who believe with him, and spare their women. But the plot of disbelievers is in naught but error.

(689) A day when ye will turn to flee, having no preserver from Allah: and he whom Allah sendeth astray, for him there is no guide.

(690) And verily Joseph brought you of old clear proofs, yet ye ceased not to be in doubt concerning what he brought you till, when he died, ye said: Allah will not send any messenger after him. Thus Allah deceiveth him who is a prodigal, a doubter.