The word(s) "except" appears 266 time(s) in 258 verse(s) in Quran in Mohsin Khan translation.

(131) except as a Mercy from your Lord. Verily His Grace unto you (O Muhammad صلى الله عليه و سلم) is ever great.

(132) And nothing prevented men from believing when the guidance came to them, except that they said: "Has Allah sent a man as (His) Messenger?"

(133) (The young men said to one another): "And when you withdraw from them, and that which they worship, except Allah, then seek refuge in the Cave; your Lord will open a way for you from His Mercy and will make easy for you your affair (i.e. will give you what you will need of provision, dwelling)."

(134) (Some) say they were three, the dog being the fourth among them; and (others) say they were five, the dog being the sixth, - guessing at the unseen; (yet others) say they were seven, and the dog being the eighth. Say (O Muhammad صلى الله عليه وسلم): "My Lord knows best their number; none knows them but a few." So debate not (about their number) except with the clear proof (which We have revealed to you). And consult not any of them (people of the Scripture - Jews and Christians) about (the affair of) the people of the Cave.

(135) except (with the saying), "If Allah will!" And remember your Lord when you forget and say: "It may be that my Lord guides me unto a nearer way of truth than this."

(136) And (remember) when We said to the angels: "Prostrate yourselves unto Adam." So they prostrated themselves except Iblis (Satan). He was one of the jinn; he disobeyed the Command of his Lord. Will you then take him (Iblis) and his offspring as protectors and helpers rather than Me while they are enemies to you? What an evil is the exchange for the Zalimun (polytheists, and wrong-doers).

(137) And nothing prevents men from believing, (now) when the guidance (the Qur'an) has come to them, and from asking Forgiveness of their Lord, except that the ways of the ancients be repeated with them (i.e. their destruction decreed by Allah), or the torment be brought to them face to face?

(138) And We send not the Messengers except as givers of glad tidings and warners. But those who disbelieve, dispute with false argument, in order to refute the truth thereby. And they treat My Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), and that with which they are warned, as a jest and mockery!

(139) except those who repent and believe (in the Oneness of Allah and His Messenger Muhammad صلى الله عليه وسلم), and work righteousness. Such will enter Paradise and they will not be wronged in aught.

(140) And we (angels) descend not except by the Command of your Lord (O Muhammad صلى الله عليه وسلم). To Him belongs what is before us and what is behind us, and what is between those two; and your Lord is never forgetful -