The word(s) "certainly" appears 476 time(s) in 417 verse(s) in Quran in Muhammad Habib Shakir translation.

(141) We narrate to you the best of narratives, by Our revealing to you this Quran, though before this you were certainly one of those who did not know.

(142) certainly in Yusuf and his brothers there are signs for the inquirers.

(143) When they said: certainly Yusuf and his brother are dearer to our father than we, though we are a (stronger) company; most surely our father is in manifest error:

(144) They said: Surely if the wolf should devour him notwithstanding that we are a (strong) company, we should then certainly be losers.

(145) So when they had gone off with him and agreed that they should put him down at the bottom of the pit, and We revealed to him: You will most certainly inform them of this their affair while they do not perceive.

(146) And certainly she made for him, and he would have made for her, were it not that he had seen the manifest evidence of his Lord; thus (it was) that We might turn away from him evil and indecency, surely he was one of Our sincere servants.

(147) She said: This is he with respect to whom you blamed me, and certainly I sought his yielding himself (to me), but he abstained, and if he does not do what I bid him, he shall certainly be imprisoned, and he shall certainly be of those who are in a state of ignominy.

(148) And certainly the reward of the hereafter is much better for those who believe and guard (against evil).

(149) He said: I will by no means send him with you until you give me a firm covenant in Allah's name that you will most certainly bring him back to me, unless you are completely surrounded. And when they gave him their covenant, he said: Allah is the One in Whom trust is placed as regards what we say.

(150) They said: By Allah! now has Allah certainly chosen you over us, and we were certainly sinners.