The word(s) "could" appears 105 time(s) in 97 verse(s) in Quran in Abdullah Yusuf Ali translation.

(81) What! Do they say, "He has forged a falsehood against Allah"? But if Allah willed, He could seal up thy heart. And Allah blots out Vanity, and proves the Truth by His Words. For He knows well the secrets of all hearts.

(82) In order that ye may sit firm and square on their backs, and when so seated, ye may celebrate the (kind) favour of your Lord, and say, "Glory to Him Who has subjected these to our (use), for we could never have accomplished this (by ourselves),

(83) And (silver) doors to their houses, and thrones (of silver) on which they could recline,

(84) And if it were Our Will, We could make angels from amongst you, succeeding each other on the earth.

(85) To them will be passed round, dishes and goblets of gold: there will be there all that the souls could desire, all that their eyes could delight in: and ye shall abide therein (for eye).

(86) Therefore, when ye meet the Unbelievers (in fight), smite at their necks; At length, when ye have thoroughly subdued them, bind a bond firmly (on them): thereafter (is the time for) either generosity or ransom: Until the war lays down its burdens. Thus (are ye commanded): but if it had been Allah's Will, He could certainly have exacted retribution from them (Himself); but (He lets you fight) in order to test you, some with others. But those who are slain in the Way of Allah,- He will never let their deeds be lost.

(87) Had We so wiled, We could have shown them up to thee, and thou shouldst have known them by their marks: but surely thou wilt know them by the tone of their speech! And Allah knows all that ye do.

(88) If only they had patience until thou couldst come out to them, it would be best for them: but Allah is Oft-Forgiving, Most Merciful.

(89) Then they could not even stand (on their feet), nor could they help themselves.

(90) Were it Our Will, We could crumble it to dry powder, and ye would be left in wonderment,