The word(s) "certainly" appears 107 time(s) in 101 verse(s) in Quran in Abdullah Yusuf Ali translation.

(71) But they rejected him, and they will certainly be called up (for punishment),-

(72) He would certainly have remained inside the Fish till the Day of Resurrection.

(73) "We should certainly have been Servants of Allah, sincere (and devoted)!"

(74) That they would certainly be assisted,

(75) "That I will certainly fill Hell with thee and those that follow thee,- every one."

(76) "And ye shall certainly know the truth of it (all) after a while."

(77) "Or (lest) it should say: 'If only Allah had guided me, I should certainly have been among the righteous!'-

(78) "Or (lest) it should say when it (actually) sees the penalty: 'If only I had another chance, I should certainly be among those who do good!'

(79) The Hour will certainly come: Therein is no doubt: Yet most men believe not.

(80) Behold, the messengers came to them, from before them and behind them, (preaching): "Serve none but Allah." They said, "If our Lord had so pleased, He would certainly have sent down angels (to preach). Now we reject your mission (altogether)."