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

(51) (Pharaoh) said: "If thou dost put forward any god other than me, I will certainly put thee in prison!"

(52) So they threw their ropes and their rods, and said: "By the might of Pharaoh, it is we who will certainly win!"

(53) "I will certainly punish him with a severe penalty, or execute him, unless he bring me a clear reason (for absence)."

(54) And it certainly is a Guide and a Mercy to those who believe.

(55) He said: "We will certainly strengthen thy arm through thy brother, and invest you both with authority, so they shall not be able to touch you: with Our Sign shall ye triumph,- you two as well as those who follow you."

(56) We did test those before them, and Allah will certainly know those who are true from those who are false.

(57) And Allah most certainly knows those who believe, and as certainly those who are Hypocrites.

(58) He said: "But there is Lut there." They said: "Well do we know who is there: we will certainly save him and his following,- except his wife: she is of those who lag behind!"

(59) They ask thee to hasten on the Punishment (for them): had it not been for a term (of respite) appointed, the Punishment would certainly have come to them: and it will certainly reach them,- of a sudden, while they perceive not!

(60) If indeed thou ask them who has created the heavens and the earth and subjected the sun and the moon (to his Law), they will certainly reply, "Allah". How are they then deluded away (from the truth)?