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

(271) Nor unto those whom, when they came to thee (asking) that thou shouldst mount them, thou didst tell: I cannot find whereon to mount you. They turned back with eyes flowing with tears, for sorrow that they could not find the means to spend.

(272) The road (of blame) is only against those who ask for leave of thee (to stay at home) when they are rich. They are content to be with the useless. Allah hath sealed their hearts so that they know not.

(273) They will make excuse to you (Muslims) when ye return unto them. Say: Make no excuse, for we shall not believe you. Allah hath told us tidings of you. Allah and His messenger will see your conduct, and then ye will be brought back unto Him Who knoweth the Invisible as well as the Visible, and He will tell you what ye used to do.

(274) They will swear by Allah unto you, when ye return unto them, that ye may let them be. Let them be, for lo! they are unclean, and their abode is hell as the reward for what they used to earn.

(275) The prayer of Abraham for the forgiveness of his father was only because of a promise he had promised him, but when it had become clear unto him that he (his father) was an enemy to Allah he (Abraham) disowned him. Lo! Abraham was soft of heart, long-suffering.

(276) And to the three also (did He turn in mercy) who were left behind, when the earth, vast as it is, was straitened for them, and their own souls were straitened for them till they bethought them that there is no refuge from Allah save toward Him. Then turned He unto them in mercy that they (too) might turn (repentant unto Him). Lo! Allah! He is the Relenting, the Merciful.

(277) And the believers should not all go out to fight. Of every troop of them, a party only should go forth, that they (who are left behind) may gain sound knowledge in religion, and that they may warn their folk when they return to them, so that they may beware.

(278) And whenever a surah is revealed there are some of them who say: Which one of you hath thus increased in faith? As for those who believe, it hath increased them in faith and they rejoice (therefor).

(279) And whenever a surah is revealed, they look one at another (as who should say): Doth anybody see you? Then they turn away. Allah turneth away their hearts because they are a folk who understand not.

(280) And if misfortune touch a man he crieth unto Us, (while reclining) on his side, or sitting or standing, but when We have relieved him of the misfortune he goeth his way as though he had not cried unto Us because of a misfortune that afflicted him. Thus is what they do made (seeming) fair unto the prodigal.