The word(s) "believer" appears 651 time(s) in 556 verse(s) in Quran in Mohsin Khan translation.

(331) And if (We had) not (sent you to the people of Makkah) - in case a calamity should seize them for (the deeds) that their hands have sent forth, they would have said: "Our Lord! Why did You not send us a Messenger? We would then have followed Your Ayat (Verses of the Qur'an) and would have been among the believers."

(332) But when the truth (i.e. Muhammad صلى الله عليه وسلم with his Message) has come to them from Us, they say: "Why is he not given the like of what was given to Musa (Moses)? Did they not disbelieve in that which was given to Musa (Moses) of old? They say: "Two kinds of magic [the Taurat (Torah) and the Qur'an], each helping the other!" And they say: "Verily in both we are disbelievers."

(333) And never will your Lord destroy the towns (populations) until He sends to their mother town a Messenger reciting to them Our Verses. And never would We destroy the towns unless the people thereof are Zalimun (polytheists, wrong-doers, disbelievers in the Oneness of Allah, oppressors and tyrants).

(334) He said: "This has been given to me only because of the knowledge I possess." Did he not know that Allah had destroyed before him generations, men who were stronger than him in might and greater in the amount (of riches) they had collected? But the Mujrimun (criminals, disbelievers, polytheists, sinners) will not be questioned of their sins (because Allah knows them well, so they will be punished without being called to account).

(335) And those who had desired (for a position like) his position the day before, began to say: "Know you not that it is Allah Who enlarges the provision or restricts it to whomsoever He pleases of His slaves. Had it not been that Allah was Gracious to us, He could have caused the earth to swallow us up (also)! Know you not that the disbelievers will never be successful.

(336) And you were not expecting that the Book (this Qur'an) would be sent down to you, but it is a mercy from your Lord. So never be a supporter of the disbelievers.

(337) And indeed We sent Nuh (Noah) to his people, and he stayed among them a thousand years less fifty years [inviting them to believe in the Oneness of Allah (Monotheism), and discard the false gods and other deities]; and the Deluge overtook them while they were Zalimun (wrong-doers, polytheists, disbelievers).

(338) And thus We have sent down the Book (i.e. this Qur'an) to you (O Muhammad صلى الله عليه وسلم), and those whom We gave the Scripture [the Taurat (Torah) and the Injeel (Gospel) aforetime] believe therein as also do some of these (who are present with you now like 'Abdullah bin Salam) and none but the disbelievers reject Our Ayat [(proofs, signs, verses, lessons, etc.,) and deny Our Oneness of Lordship and Our Oneness of worship and Our Oneness of Our Names and Qualities: i.e. Islamic Monotheism].

(339) They ask you to hasten on the torment. And verily, Hell, of a surety, will encompass the disbelievers.

(340) And if you were to ask them: "Who has created the heavens and the earth and subjected the sun and the moon?" they will surely reply: "Allah." How then are they deviating (as polytheists and disbelievers)?