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

(151) Will ye then dispute with him concerning what he seeth?

(152) Concerning which then, of the bounties of thy Lord, canst thou dispute?

(153) They will cry unto them (saying): Were we not with you? They will say: Yea, verily; but ye tempted one another, and hesitated, and doubted, and vain desires beguiled you till the ordinance of Allah came to pass; and the deceiver deceived you concerning Allah;

(154) Allah hath heard the saying of her that disputeth with thee (Muhammad) concerning her husband, and complaineth unto Allah. And Allah heareth your colloquy. Lo! Allah is Hearer, Knower.

(155) He knoweth all that is in the heavens and the earth, and He knoweth what ye conceal and what ye publish. And Allah is Aware of what is in the breasts (of men).

(156) And lo! those who disbelieve would fain disconcert thee with their eyes when they hear the Reminder, and they say: Lo! he is indeed mad;

(157) And if he had invented false sayings concerning Us,

(158) A questioner questioned concerning the doom about to fall

(159) And that the foolish one among us used to speak concerning Allah an atrocious lie.

(160) And lo! we had supposed that humankind and jinn would not speak a lie concerning Allah -