The word(s) "had" appears 368 time(s) in 323 verse(s) in Quran in Abdullah Yusuf Ali translation.

(271) For when their messengers came to them with Clear Signs, they exulted in such knowledge (and skill) as they had; but that very (Wrath) at which they were wont to scoff hemmed them in.

(272) Moreover He comprehended in His design the sky, and it had been (as) smoke: He said to it and to the earth: "Come ye together, willingly or unwillingly." They said: "We do come (together), in willing obedience."

(273) Behold, the messengers came to them, from before them and behind them, (preaching): "Serve none but Allah." They said, "If our Lord had so pleased, He would certainly have sent down angels (to preach). Now we reject your mission (altogether)."

(274) As to the Thamud, We gave them Guidance, but they preferred blindness (of heart) to Guidance: so the stunning Punishment of humiliation seized them, because of what they had earned.

(275) had We sent this as a Qur'an (in the language) other than Arabic, they would have said: "Why are not its verses explained in detail? What! (a Book) not in Arabic and (a Messenger an Arab?" Say: "It is a Guide and a Healing to those who believe; and for those who believe not, there is a deafness in their ears, and it is blindness in their (eyes): They are (as it were) being called from a place far distant!"

(276) We certainly gave Moses the Book aforetime: but disputes arose therein. had it not been for a Word that went forth before from thy Lord, (their differences) would have been settled between them: but they remained in suspicious disquieting doubt thereon.

(277) If Allah had so willed, He could have made them a single people; but He admits whom He will to His Mercy; and the Wrong-doers will have no protector nor helper.

(278) And they became divided only after Knowledge reached them,- through selfish envy as between themselves. had it not been for a Word that went forth before from thy Lord, (tending) to a Term appointed, the matter would have been settled between them: But truly those who have inherited the Book after them are in suspicious (disquieting) doubt concerning it.

(279) What! have they partners (in godhead), who have established for them some religion without the permission of Allah? had it not been for the Decree of Judgment, the matter would have been decided between them (at once). But verily the Wrong-doers will have a grievous Penalty.

(280) ("Ah!") they say, "If it had been the will of (Allah) Most Gracious, we should not have worshipped such (deities)!" Of that they have no knowledge! they do nothing but lie!