The word(s) "where" appears 298 time(s) in 278 verse(s) in Quran in Muhammad Pickthal translation.

(141) Lo! Allah will cause those who believe and do good works to enter Gardens underneath which rivers flow, wherein they will be allowed armlets of gold, and pearls, and their raiment therein will be silk.

(142) Those who have been driven from their homes unjustly only because they said: Our Lord is Allah - For had it not been for Allah's repelling some men by means of others, cloisters and churches and oratories and mosques, wherein the name of Allah is oft mentioned, would assuredly have been pulled down. Verily Allah helpeth one who helpeth Him. Lo! Allah is Strong, Almighty -

(143) Have they not travelled in the land, and have they hearts wherewith to feel and ears wherewith to hear? For indeed it is not the eyes that grow blind, but it is the hearts, which are within the bosoms, that grow blind.

(144) That is because Allah, He is the True, and that whereon they call instead of Him, it is the false, and because Allah, He is the High, the Great.

(145) Allah will judge between you on the Day of Resurrection concerning that wherein ye used to differ.

(146) And they worship instead of Allah that for which He hath sent down no warrant, and that whereof they have no knowledge. For evil-doers there is no helper.

(147) Then We produce for you therewith gardens of date-palms and grapes, wherein is much fruit for you and whereof ye eat;

(148) And the chieftains of his folk, who disbelieved and denied the meeting of the Hereafter, and whom We had made soft in the life of the world, said: This is only a mortal like you, who eateth of that whereof ye eat and drinketh of that ye drink.

(149) Think they that in the wealth and sons wherewith We provide them

(150) (Here is) a surah which We have revealed and enjoined, and wherein We have revealed plain tokens, that haply ye may take heed.