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

(391) (Saying): If ye do good, ye do good for your own souls, and if ye do evil, it is for them (in like manner). So, when the time for the second (of the judgments) came (We roused against you others of Our slaves) to ravage you, and to enter the Temple even as they entered it the first time, and to lay waste all that they conquered with an utter wasting.

(392) And when We would destroy a township We send commandment to its folk who live at ease, and afterward they commit abomination therein, and so the Word (of doom) hath effect for it, and we annihilate it with complete annihilation.

(393) And lower unto them the wing of submission through mercy, and say: My Lord! Have mercy on them both as they did care for me when I was little.

(394) Fill the measure when ye measure, and weigh with a right balance; that is meet, and better in the end.

(395) And when thou recitest the Qur'an we place between thee and those who believe not in the Hereafter a hidden barrier;

(396) And We place upon their hearts veils lest they should understand it, and in their ears a deafness; and when thou makest mention of thy Lord alone in the Qur'an, they turn their backs in aversion.

(397) We are Best Aware of what they wish to hear when they give ear to thee and when they take secret counsel, when the evil-doers say: Ye follow but a man bewitched.

(398) And they say: when we are bones and fragments, shall we forsooth, be raised up as a new creation?

(399) Or some created thing that is yet greater in your thoughts! Then they will say: Who shall bring us back (to life). Say: He Who created you at the first. Then will they shake their heads at thee, and say: when will it be? Say: It will perhaps be soon;

(400) A day when He will call you and ye will answer with His praise, and ye will think that ye have tarried but a little while.