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

(601) And remember Our slave Ayyub (Job), when he invoked his Lord (saying): "Verily Shaitan (Satan) has touched me with distress (by ruining my health) and torment (by ruining my wealth)!

(602) "I had no knowledge of the chiefs (angels) on high when they were disputing and discussing (about the creation of Adam).

(603) (Remember) when your Lord said to the angels: "Truly I am going to create man from clay".

(604) So when I have fashioned him and breathed into him (his) soul created by Me, then you fall down prostrate to him."

(605) And when some hurt touches man, he cries to his Lord (Allah Alone), turning to Him in repentance. But when He bestows a favour upon him from Himself, he forgets that for which he cried for before, and he sets up rivals to Allah, in order to mislead others from His Path. Say: "Take pleasure in your disbelief for a while: surely you are (one) of the dwellers of the Fire!"

(606) Allah has sent down the Best Statement, a Book (this Qur'an), its parts resembling each other (in goodness and truth) (and) oft-repeated. The skins of those who fear their Lord shiver from it (when they recite it or hear it). Then their skin and their heart soften to the remembrance of Allah. That is the guidance of Allah. He Guides therewith whom He wills; and whomever Allah sends astray, for him there is no guide.

(607) Then, who does more wrong than one who utters a lie against Allah, and denies the truth [this Qur'an, the Prophet (Muhammad صلى الله عليه وسلم) and the Islamic Monotheism] when it comes to him! Is there not in Hell an abode for the disbelievers?

(608) And when Allah Alone is mentioned, the hearts of those who believe not in the Hereafter are filled with disgust (from the Oneness of Allah توحيد الله) and when those (whom they obey or worship) besides Him [like all false deities other than Allah, - it may be a Messenger, an angel, a pious man, a jinni, or any other creature even idols, graves of religious people, saints, priests, monks and others.] are mentioned, behold, they rejoice!

(609) when harm touches man, he calls to Us (for help); then when We have (rescued him from that harm and) changed it into a favour from Us, he says: "Only because of knowledge (that I possess) I obtained it." Nay, it is only a trial, but most of them know not!

(610) Or (lest) he should say when he sees the torment: "If only I had another chance (to return to the world), then I should indeed be among the Muhsinun (good-doers - See V.2:112)."