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

(541) And when Our Verses (of the Qur'an) are recited to such a one, he turns away in pride, as if he heard them not - as if there were deafness in his ear. So announce to him a painful torment.

(542) And (remember) when Luqman said to his son when he was advising him: "O my son! Join not in worship others with Allah. Verily joining others in worship with Allah is a great Zulm (wrong) indeed.

(543) And when it is said to them: "Follow that which Allah has sent down", they say: "Nay, we shall follow that which we found our fathers (following)." (Would they do so) even if Shaitan (Satan) invites them to the torment of the Fire?

(544) And when a wave covers them like shades (i.e. like clouds or the mountains of sea-water), they invoke Allah, making their invocations for Him only. But when He brings them safe to land, there are among them those that stop in between (Belief and disbelief). But none denies Our Signs except every perfidious ingrate.

(545) O mankind! Be afraid of your Lord (by keeping your duty to Him and avoiding all evil), and fear a Day when no father can avail aught for his son, nor a son avail aught for his father. Verily, the Promise of Allah is true: let not then this (worldly) present life deceive you, nor let the chief deceiver (Satan) deceive you about Allah.

(546) And they say: "when we are (dead and become) lost in the earth, shall we indeed be created anew?" Nay, but they deny the Meeting with their Lord!

(547) And if you only could see when the Mujrimun (criminals, disbelievers, polytheists, sinners) shall hang their heads before their Lord (saying): "Our Lord! We have now seen and heard, so send us back (to the world), that we will do righteous good deeds. Verily! We now believe with certainty."

(548) Only those believe in Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), who, when they are reminded of them, fall down prostrate, and glorify the Praises of their Lord, and they are not proud.

(549) And indeed We gave Musa (Moses) the Scripture [the Taurat (Torah)] So be not you in doubt of meeting him [i.e. when you met Musa (Moses) during the night of Al-Isra' and Al-Mi'raj over the heavens]. And We made it [the Taurat (Torah)] a guide to the Children of Israel.

(550) And We made from among them (Children of Israel), leaders, giving guidance under Our Command, when they were patient and used to believe with certainty in Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.).