The word(s) "what" appears 597 time(s) in 511 verse(s) in Quran in Muhammad Pickthal translation.

(291) Till, when they come (before their Lord), He will say: Did ye deny My revelations when ye could not compass them in knowledge, or what was it that ye did?

(292) And thou seest the hills thou deemest solid flying with the flight of clouds: the doing of Allah Who perfecteth all things. Lo! He is Informed of what ye do.

(293) And whoso bringeth an ill-deed, such will be flung down on their faces in the Fire. Are ye rewarded aught save what ye did?

(294) And say: Praise be to Allah Who will show you His portents so that ye shall know them. And thy Lord is not unaware of what ye (mortals) do.

(295) We narrate unto thee (somewhat) of the story of Moses and Pharaoh with truth, for folk who believe.

(296) And when he came unto the water of Midian he found there a whole tribe of men, watering. And he found apart from them two women keeping back (their flocks). He said: what aileth you? The two said: We cannot give (our flocks) to drink till the shepherds return from the water; and our father is a very old man.

(297) So he watered (their flock) for them. Then he turned aside into the shade, and said: My Lord! I am needy of whatever good Thou sendest down for me.

(298) He said: That (is settled) between thee and me. Whichever of the two terms I fulfil, there will be no injustice to me, and Allah is Surety over what we say.

(299) But when there came unto them the Truth from Our presence, they said: Why is he not given the like of what was given unto Moses? Did they not disbelieve in that which was given unto Moses of old? They say: Two magics that support each other; and they say: Lo! in both we are disbelievers.

(300) And if they answer thee not, then know that what they follow is their lusts. And who goeth farther astray than he who followeth his lust without guidance from Allah. Lo! Allah guideth not wrongdoing folk.