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

(611) Couldst thou but see when the guilty hang their heads before their Lord, (and say): Our Lord! We have now seen and heard, so send us back; we will do right, now we are sure.

(612) Only those believe in Our revelations who, when they are reminded of them, fall down prostrate and hymn the praise of their Lord, and they are not scornful,

(613) And as for those who do evil, their retreat is the Fire. whenever they desire to issue forth from thence, they are brought back thither. Unto them it is said: Taste the torment of the Fire which ye used to deny.

(614) And when they became steadfast and believed firmly in Our revelations, We appointed from among them leaders who guided by Our command.

(615) And they say: when cometh this victory (of yours) if ye are truthful?

(616) And when We exacted a covenant from the prophets, and from thee (O Muhammad) and from Noah and Abraham and Moses and Jesus son of Mary. We took from them a solemn covenant;

(617) O ye who believe! Remember Allah's favour unto you when there came against you hosts, and We sent against them a great wind and hosts ye could not see. And Allah is ever Seer of what ye do.

(618) when they came upon you from above you and from below you, and when eyes grew wild and hearts reached to the throats, and ye were imagining vain thoughts concerning Allah.

(619) And when the hypocrites, and those in whose hearts is a disease, were saying: Allah and His messenger promised us naught but delusion.

(620) And when a party of them said: O folk of Yathrib! There is no stand (possible) for you, therefor turn back. And certain of them (even) sought permission of the Prophet, saying: Our homes lie open (to the enemy). And they lay not open. They but wished to flee.