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

(171) And certainly We have given you seven of the oft-repeated (verses) and the grand Quran.

(172) So, by your Lord, We would most certainly question them all,

(173) And upon Allah it rests to show the right way, and there are some deviating (ways); and if He please He would certainly guide you all aright.

(174) Therefore enter the gates of hell, to abide therein; so certainly evil is the dwelling place of the proud.

(175) And it is said to those who guard (against evil): What is it that your Lord has revealed? They say, Good. For those who do good in this world is good, and certainly the abode of the hereafter is better; and certainly most excellent is the abode of those who guard (against evil);

(176) And certainly We raised in every nation an apostle saying: Serve Allah and shun the Shaitan. So there were some of them whom Allah guided and there were others against whom error was due; therefore travel in the land, then see what was the end of the rejecters.

(177) And those who fly for Allah's sake after they are oppressed, We will most certainly give them a good abode in the world, and the reward of the hereafter is certainly much greater, did they but know;

(178) And they set apart for what they do not know a portion of what We have given them. By Allah, you shall most certainly be questioned about that which you forged.

(179) By Allah, most certainly We sent (apostles) to nations before you, but the Shaitan made their deeds fair-seeming to them, so he is their guardian today, and they shall have a painful punishment.

(180) And be not like her who unravels her yarn, disintegrating it into pieces after she has spun it strongly. You make your oaths to be means of deceit between you because (one) nation is more numerous than (another) nation. Allah only tries you by this; and He will most certainly make clear to you on the resurrection day that about which you differed.