The word(s) "when" appears 926 time(s) in 834 verse(s) in Quran in Muhammad Habib Shakir translation.

(421) And they say: when will this threat come to pass if you are truthful?

(422) Had those who disbelieve but known (of the time) when they shall not be able to ward off the fire from their faces nor from their backs, nor shall they be helped.

(423) Say: I warn you only by revelation; and the deaf do not hear the call whenever they are warned.

(424) when he said to his father and his people: What are these images to whose worship you cleave?

(425) And Nuh, when he cried aforetime, so We answered him, and delivered him and his followers from the great calamity.

(426) And Dawood and Sulaiman when they gave judgment concerning the field when the people's sheep pastured therein by night, and We were bearers of witness to their judgment.

(427) And Ayub, when he cried to his Lord, (saying): Harm has afflicted me, and Thou art the most Merciful of the merciful.

(428) And Yunus, when he went away in wrath, so he thought that We would not straiten him, so he called out among afflictions: There is no god but Thou, glory be to Thee; surely I am of those who make themselves to suffer loss.

(429) And Zakariya, when he cried to his Lord: O my Lord leave me not alone; and Thou art the best of inheritors.

(430) Even when Gog and Magog are let loose and they shall break forth from every elevated place.