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

(461) (Allah will say to the angels): "Both of you throw into Hell every stubborn disbeliever (in the Oneness of Allah, in His Messengers).

(462) They said: "We have been sent to a people who are Mujrimun (polytheists, sinners, criminals, disbelievers in Allah)

(463) So We brought out from therein the believers.

(464) And remind (by preaching the Qur'an, O Muhammad صلى الله عليه وسلم), for verily, the reminding profits the believers.

(465) Hastening towards the caller. The disbelievers will say: "This is a hard Day."

(466) Are your disbelievers (O Quraish!) better than these [nations of Nuh (Noah), Lut (Lot), Salih, and the people of Fir'aun (Pharaoh) who were destroyed)? Or have you an immunity (against Our Torment) in the Divine Scriptures?

(467) Verily the Mujrimun (polytheists, disbelievers, sinners, criminals) are in error (in this world) and will burn (in the Hell-fire in the Hereafter).

(468) So on that Day no question will be asked of man or jinns as to his sin, [because they have already been known from their faces either white (dwellers of Paradise - true believers of Islamic Monotheism) or black (dwellers of Hell - polytheists; disbelievers, criminals)].

(469) Is it such a talk (this Qur'an) that you (disbelievers) deny?

(470) And what is the matter with you that you believe not in Allah! While the Messenger (Muhammad صلى الله عليه وسلم) invites you to believe in your Lord (Allah); and He (Allah) has indeed taken your covenant, if you are real believers.