The word(s) "while" appears 87 time(s) in 86 verse(s) in Quran in Abdullah Yusuf Ali translation.

(31) They said: "If the wolf were to devour him while we are (so large) a party, then should we indeed (first) have perished ourselves!"

(32) So they did take him away, and they all agreed to throw him down to the bottom of the well: and We put into his heart (this Message): 'Of a surety thou shalt (one day) tell them the truth of this their affair while they know (thee) not'

(33) Do they then feel secure from the coming against them of the covering veil of the wrath of Allah,- or of the coming against them of the (final) Hour all of a sudden while they perceive not?

(34) He sends down water from the skies, and the channels flow, each according to its measure: But the torrent bears away to foam that mounts up to the surface. Even so, from that (ore) which they heat in the fire, to make ornaments or utensils therewith, there is a scum likewise. Thus doth Allah (by parables) show forth Truth and Vanity. For the scum disappears like forth cast out; while that which is for the good of mankind remains on the earth. Thus doth Allah set forth parables.

(35) We know indeed that they say, "It is a man that teaches him." The tongue of him they wickedly point to is notably foreign, while this is Arabic, pure and clear.

(36) We have made the Night and the Day as two (of Our) Signs: the Sign of the Night have We obscured, while the Sign of the Day We have made to enlighten you; that ye may seek bounty from your Lord, and that ye may know the number and count of the years: all things have We explained in detail.

(37) "It will be on a Day when He will call you, and ye will answer (His call) with (words of) His praise, and ye will think that ye tarried but a little while!"

(38) Their purpose was to scare thee off the land, in order to expel thee; but in that case they would not have stayed (therein) after thee, except for a little while.

(39) Thou wouldst have seen the sun, when it rose, declining to the right from their Cave, and when it set, turning away from them to the left, while they lay in the open space in the midst of the Cave. Such are among the Signs of Allah: He whom Allah, guides is rightly guided; but he whom Allah leaves to stray,- for him wilt thou find no protector to lead him to the Right Way.

(40) "Those whose efforts have been wasted in this life, while they thought that they were acquiring good by their works?"