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

(471) Say (O Muhammad, unto mankind): I warn you only by the Inspiration. But the deaf hear not the call when they are warned.

(472) when he said unto his father and his folk: What are these images unto which ye pay devotion?

(473) And Noah, when he cried of old, We heard his prayer and saved him and his household from the great affliction.

(474) And David and Solomon, when they gave judgment concerning the field, when people's sheep had strayed and browsed therein by night; and We were witnesses to their judgment.

(475) And Job, when he cried unto his Lord, (saying): Lo! adversity afflicteth me, and Thou art Most Merciful of all who show mercy.

(476) And (mention) Dhu'n-Nun, when he went off in anger and deemed that We had no power over him, but he cried out in the darkness, saying: There is no Allah save Thee. Be Thou Glorified! Lo! I have been a wrong-doer.

(477) And Zachariah, when he cried unto his Lord: My Lord! Leave me not childless, though Thou art the Best of inheritors.

(478) Until, when Gog and Magog are let loose, and they hasten out of every mound,

(479) The Day when We shall roll up the heavens as a recorder rolleth up a written scroll. As We began the first creation, We shall repeat it. (It is) a promise (binding) upon Us. Lo! We are to perform it.

(480) On the day when ye behold it, every nursing mother will forget her nursling and every pregnant one will be delivered of her burden, and thou (Muhammad) wilt see mankind as drunken, yet they will not be drunken, but the Doom of Allah will be strong (upon them).