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

(371) certainly you were heedless of it, but now We have removed from you your veil, so your sight today is sharp.

(372) And certainly We created the heavens and the earth and what is between them in six periods and there touched Us not any fatigue.

(373) And certainly he saw him in another descent,

(374) certainly he saw of the greatest signs of his Lord.

(375) They are naught but names which you have named, you and your fathers; Allah has not sent for them any authority. They follow naught but conjecture and the low desires which (their) souls incline to; and certainly the guidance has come to them from their Lord.

(376) And certainly some narratives have come to them wherein is prevention--

(377) And certainly We left it as a sign, but is there anyone who

(378) And certainly We have made the Quran easy for remembrance, but is there anyone who will mind?

(379) And certainly We have made the Quran easy for remembrance, but is there anyone who will mind?

(380) And certainly We have made the Quran easy for remembrance, but is there anyone who will mind?