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

(671) And when I have fashioned him and breathed into him of My Spirit, then fall down before him prostrate,

(672) He said: My Lord! Reprieve me till the day when they are raised.

(673) And when some hurt toucheth man, he crieth unto his Lord, turning unto Him (repentant). Then, when He granteth him a boon from Him he forgetteth that for which he cried unto Him before, and setteth up rivals to Allah that he may beguile (men) from his way. Say (O Muhammad, unto such an one): Take pleasure in thy disbelief a while. Lo! thou art of the owners of the Fire.

(674) Those before them denied, and so the doom came on them whence they knew not.

(675) And who doth greater wrong than he who telleth a lie against Allah, and denieth the truth when it reacheth him? Will not the home of disbelievers be in hell?

(676) And when Allah alone is mentioned, the hearts of those who believe not in the Hereafter are repelled, and when those (whom they worship) beside Him are mentioned, behold! they are glad.

(677) Now when hurt toucheth a man he crieth unto Us, and afterward when We have granted him a boon from Us, he saith: Only by force of knowledge I obtained it. Nay, but it is a test. But most of them know not.

(678) Turn unto your Lord repentant, and surrender unto Him, before there come unto you the doom, when ye cannot be helped.

(679) And follow the better (guidance) of that which is revealed unto you from your Lord, before the doom cometh on you suddenly when ye know not,

(680) Or should say, when it seeth the doom: Oh, that I had but a second chance that I might be among the righteous!