The word(s) "once" appears 177 time(s) in 167 verse(s) in Quran in Muhammad Pickthal translation.

(31) O People of the Scripture! Do not exaggerate in your religion nor utter aught concerning Allah save the truth. The Messiah, Jesus son of Mary, was only a messenger of Allah, and His word which He conveyed unto Mary, and a spirit from Him. So believe in Allah and His messengers, and say not "Three" - Cease! (it is) better for you! - Allah is only One Allah. Far is it removed from His Transcendent Majesty that He should have a son. His is all that is in the heavens and all that is in the earth. And Allah is sufficient as Defender.

(32) They ask thee for a pronouncement. Say: Allah hath pronounced for you concerning distant kindred. If a man die childless and he have a sister, hers is half the heritage, and he would have inherited from her had she died childless. And if there be two sisters, then theirs are two-thirds of the heritage, and if they be brethren, men and women, unto the male is the equivalent of the share of two females. Allah expoundeth unto you, so that ye err not. Allah is Knower of all things.

(33) O ye who believe! Profane not Allah's monuments nor the Sacred Month nor the offerings nor the garlands, nor those repairing to the Sacred House, seeking the grace and pleasure of their Lord. But when ye have left the sacred territory, then go hunting (if ye will). And let not your hatred of a folk who (once) stopped your going to the inviolable place of worship seduce you to transgress; but help ye one another unto righteousness and pious duty. Help not one another unto sin and transgression, but keep your duty to Allah. Lo! Allah is severe in punishment.

(34) There shall be no sin (imputed) unto those who believe and do good works for what they may have eaten (in the past). So be mindful of your duty (to Allah), and believe, and do good works; and again: be mindful of your duty, and believe; and once again: be mindful of your duty, and do right. Allah loveth the good.

(35) But then, if it is afterwards ascertained that both of them merit (the suspicion of) sin, let two others take their place of those nearly concerned, and let them swear by Allah, (saying): Verily our testimony is truer than their testimony and we have not transgressed (the bounds of duty), for them indeed we should be of the evil-doers.

(36) His people argued with him. He said: Dispute ye with me concerning Allah when He hath guided me? I fear not at all that which ye set up beside Him unless my Lord willeth aught. My Lord includeth all things in His knowledge. Will ye not then remember?

(37) Who is guilty of more wrong than he who forgeth a lie against Allah, or saith: I am inspired, when he is not inspired in aught; and who saith: I will reveal the like of that which Allah hath revealed? If thou couldst see, when the wrong-doers reach the pangs of death and the angels stretch their hands out (saying): Deliver up your souls. This day ye are awarded doom of degradation for that ye spake concerning Allah other than the truth, and used to scorn His portents.

(38) And of the camels twain and of the oxen twain. Say: Hath He forbidden the two males or the two females, or that which the wombs of the two females contain; or were ye by to witness when Allah commanded you (all) this? Then who doth greater wrong than he who deviseth a lie concerning Allah, that he may lead mankind astray without knowledge. Lo! Allah guideth not wrongdoing folk.

(39) Say: Come, I will recite unto you that which your Lord hath made a sacred duty for you: That ye ascribe no thing as partner unto Him and that ye do good to parents, and that ye slay not your children because of penury - We provide for you and for them - and that ye draw not nigh to lewd things whether open or concealed. And that ye slay not the life which Allah hath made sacred, save in the course of justice. This He hath command you, in order that ye may discern.

(40) Lo! As for those who sunder their religion and become schismatics, no concern at all hast thou with them. Their case will go to Allah, Who then will tell them what they used to do.