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

(381) And of the fruits of the date-palm, and grapes, whence ye derive strong drink and (also) good nourishment. Lo! therein is indeed a portent for people who have sense.

(382) And (bethink you of) the day when we raise up of every nation a witness, then there is no leave for disbelievers, nor are they allowed to make amends.

(383) And when those who did wrong behold the doom, it will not be made light for them, nor will they be reprieved.

(384) And when those who ascribed partners to Allah behold those partners of theirs, they will say: Our Lord! these are our partners unto whom we used to cry instead of Thee. But they will fling to them the saying: Lo! ye verily are liars!

(385) And (bethink you of) the day when We raise in every nation a witness against them of their own folk, and We bring thee (Muhammad) as a witness against these. And We reveal the Scripture unto thee as an exposition of all things, and a guidance and a mercy and good tidings for those who have surrendered (to Allah).

(386) Fulfil the covenant of Allah when ye have covenanted, and break not your oaths after the asseveration of them, and after ye have made Allah surety over you. Lo! Allah knoweth what ye do.

(387) And when thou recitest the Qur'an, seek refuge in Allah from Satan the outcast.

(388) And when We put a revelation in place of (another) revelation, - and Allah knoweth best what He revealeth - they say: Lo! thou art but inventing. Most of them know not.

(389) On the Day when every soul will come pleading for itself, and every soul will be repaid what it did, and they will not be wronged.

(390) So when the time for the first of the two came, We roused against you slaves of Ours of great might who ravaged (your) country, and it was a threat performed.