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

(331) And when it is said to them: "What is it that your Lord has sent down (unto Muhammad صلى الله عليه و سلم)?" They say: "Tales of the men of old!"

(332) And (when) it is said to those who are the Muttaqun (the pious - See V.2:2) "What is it that your Lord has sent down?" They say: "That which is good." For those who do good in this world, there is good, and the home of the Hereafter will be better. And excellent indeed will be the home (i.e. Paradise) of the Muttaqun (the pious - See V.2:2).

(333) Verily! Our Word unto a thing when We intend it, is only that We say unto it: "Be!" - and it is.

(334) And whatever of blessings and good things you have, it is from Allah. Then, when harm touches you, unto Him you cry aloud for help.

(335) Then, when He has removed the harm from you, behold! some of you associate others in worship with their Lord (Allah).

(336) And when the news of (the birth of) a female (child) is brought to any of them, his face becomes dark, and he is filled with inward grief!

(337) And if Allah were to seize mankind for their wrong-doing, He would not leave on it (the earth) a single moving (living) creature, but He postpones them for an appointed term and when their term comes, neither can they delay nor can they advance it an hour (or a moment).

(338) And Allah has made for you in your homes an abode, and made for you out of the hides of the cattle (tents for) dwelling, which you find so light (and handy) when you travel and when you stay (in your travels); and of their wool, fur, and hair (sheep wool, camel fur, and goat hair), furnishings and articles of convenience (e.g. carpets, blankets), comfort for a while.

(339) And (remember) the Day when We shall raise up from each nation a witness (their Messenger), then, those who disbelieved will not be given leave (to put forward excuses), nor will they be allowed (to return to the world) to repent and ask for Allah's Forgiveness (of their sins).

(340) And when those who did wrong (the disbelievers) will see the torment, then it will not be lightened unto them, nor will they be given respite.