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

(131) And (O Muhammad صلى الله عليه وسلم) recite to them (the Jews) the story of the two sons of Adam (Habil and Qabil-Abel and Cain) in truth; when each offered a sacrifice (to Allah), it was accepted from the one but not from the other. The latter said to the former: "I will surely kill you. " The former said: "Verily, Allah accepts only from those who are Al-Muttaqun (the pious - See V.2:2)."

(132) And when you proclaim the call for As-Salat [call for the prayer (Adhan )], they take it (but) as a mockery and fun; that is because they are a people who understand not.

(133) when they come to you, they say: "We believe." But in fact they enter with (an intention of) disbelief and they go out with the same. And Allah knows all what they were hiding.

(134) Verily, We took the covenant of the Children of Israel and sent Messengers to them. whenever there came to them a Messenger with what they themselves desired not, - a group of them they called liars, and others among them they killed.

(135) And when they (who call themselves Christians) listen to what has been sent down to the Messenger (Muhammad صلى الله عليه وسلم), you see their eyes overflowing with tears because of the truth they have recognised. They say: "Our Lord! We believe; so write us down among the witnesses.

(136) Allah will not punish you for what is unintentional in your oaths, but He will punish you for your deliberate oaths; for its expiation feed ten Masakin (poor persons), on a scale of the average of that with which you feed your own families, or clothe them or manumit a slave. But whosoever cannot afford (that), then he should fast for three days. That is the expiation for the oaths when you have sworn . And protect your oaths (i.e. do not swear much) . Thus Allah make clear to you His Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) that you may be grateful.

(137) And when it is said to them: "Come to what Allah has revealed and unto the Messenger (Muhammad صلى الله عليه وسلم for the verdict of that which you have made unlawful)." They say: "Enough for us is that which we found our fathers following," even though their fathers had no knowledge whatsoever nor guidance.

(138) O you who believe! when death approaches any of you, and you make a bequest, (then take) the testimony of two just men of your own folk or two others from outside, while you are travelling through the land and death befalls on you. Detain them both after As-Salat (the prayer), (then) if you are in doubt (about their truthfulness), let them both swear by Allah (saying): "We wish not for any worldly gain in this, even though he (the beneficiary) be our near relative. We shall not hide Testimony of Allah, for then indeed we should be of the sinful."

(139) On the Day when Allah will gather the Messengers together and say to them: "What was the response you received (from men to your teaching)?" They will say: "We have no knowledge, verily, only You are the All-Knower of all that is hidden (or unseen)."

(140) (Remember) when Allah will say (on the Day of Resurrection). "O 'Îsa (Jesus), son of Maryam (Mary)! Remember My Favour to you and to your mother when I supported you with Ruh-ul-Qudus [Jibril (Gabriel)] so that you spoke to the people in the cradle and in maturity; and when I taught you writing, Al-Hikmah (the power of understanding), the Taurat (Torah) and the Injeel (Gospel); and when you made out of the clay a figure like that of a bird, by My Permission, and you breathed into it, and it became a bird by My Permission, and you healed those born blind, and the lepers by My Permission, and when you brought forth the dead by My Permission; and when I restrained the Children of Israel from you (when they resolved to kill you) as you came unto them with clear proofs, and the disbelievers among them said: 'This is nothing but evident magic.'"