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

(331) And should you ask them, Who created the heavens and the earth? They would most certainly say: Allah. Say: Have you then considered that what you call upon besides Allah, would they, if Allah desire to afflict me with harm, be the removers of His harm, or (would they), if Allah desire to show me mercy, be the withholders of His mercy? Say: Allah is sufficient for me; on Him do the reliant rely.

(332) And had those who are unjust all that is in the earth and the like of it with it, they would certainly offer it as ransom (to be saved) from the evil of the punishment on the day of resurrection; and what they never thought of shall become plain to them from Allah.

(333) Or it should say: Had Allah guided me, I would certainly have been of those who guard (against evil);

(334) And certainly, it has been revealed to you and to those before you: Surely if you associate (with Allah), your work would certainly come to naught and you would certainly be of the losers.

(335) Surely those who disbelieve shall be cried out to: certainly Allah's hatred (of you) when you were called upon to the faith and you rejected, is much greater than your hatred of yourselves.

(336) And certainly We sent Musa with Our communications and clear authority,

(337) And certainly Yusuf came to you before with clear arguments, but you ever remained in doubt as to what he brought; until when he died, you said: Allah will never raise an apostle after him. Thus does Allah cause him to err who is extravagant, a doubter

(338) And certainly We gave Musa the guidance, and We made the children of Israel inherit the Book,

(339) certainly the creation of the heavens and the earth is greater than the creation of the men, but most people do not know

(340) And certainly We sent apostles before you: there are some of them that We have mentioned to you and there are others whom We have not mentioned to you, and it was not meet for an apostle that he should bring a sign except with Allah's permission, but when the command of Allah came, judgment was given with truth, and those who treated (it) as a lie were lost.