The word(s) "certain" appears 184 time(s) in 178 verse(s) in Quran in Mohsin Khan translation.

(51) certainly, those who took the calf (for worship), wrath from their Lord and humiliation will come upon them in the life of this world. Thus do We recompense those who invent lies.

(52) "And ordain for us good in this world, and in the Hereafter. certainly we have turned unto You." He said: (As to) My punishment I afflict therewith whom I will and My Mercy embraces all things. That (Mercy) I shall ordain for those who are the Muttaqun (the pious - See V.2:2), and give Zakat; and those who believe in Our Ayat (proofs, evidence, verses, lessons, signs and revelations, etc.);

(53) And (remember) when your Lord declared that He would certainly keep on sending against them (i.e. the Jews), till the Day of Resurrection, those who would afflict them with a humiliating torment. Verily, your Lord is Quick in Retribution (for the disobedient, wicked) and certainly He is Oft-Forgiving, Most Merciful (for the obedient and those who beg Allah's Forgiveness).

(54) And as to those who hold fast to the Book (i.e. act on its teachings) and perform As-Salat (Iqamat-as-Salat ), certainly We shall never waste the reward of those who do righteous deeds.

(55) And I respite them; certainly My Plan is strong.

(56) And fight them until there is no more Fitnah (disbelief and polytheism, i.e. worshipping others besides Allah) and the religion (worship) will all be for Allah Alone [in the whole of the world ]. But if they cease (worshipping others besides Allah), then certainly, Allah is All-Seer of what they do.

(57) (And remember) when you (the Muslim army) were on the near side of the valley, and they on the farther side, and the caravan on the ground lower than you. Even if you had made a mutual appointment to meet, you would certainly have failed in the appointment, but (you met) that Allah might accomplish a matter already ordained (in His Knowledge), so that those who were to be destroyed (for their rejecting the Faith) might be destroyed after a clear evidence, and those who were to live (i.e. believers) might live after a clear evidence. And surely, Allah is All-Hearer, All-Knower.

(58) (And remember) when Allah showed them to you as few in your (i.e. Muhammad's صلى الله عليه وسلم) dream; if He had shown them to you as many, you would surely have been discouraged, and you would surely have disputed in making a decision. But Allah saved (you). certainly, He is the All-Knower of what is in the breasts.

(59) If you (O Muhammad صلى الله عليه وسلم) fear treachery from any people throw back (their covenant) to them (so as to be) on equal terms (that there will be no more covenant between you and them). certainly Allah likes not the treacherous.

(60) And He has united their (i.e. believers') hearts. If you had spent all that is in the earth, you could not have united their hearts, but Allah has united them. certainly He is All-Mighty, All-Wise.