The word(s) "disbelieve" appears 631 time(s) in 561 verse(s) in Quran in Mohsin Khan translation.

(261) And We send not the Messengers except as givers of glad tidings and warners. But those who disbelieve, dispute with false argument, in order to refute the truth thereby. And they treat My Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), and that with which they are warned, as a jest and mockery!

(262) He said: "As for him (a disbeliever in the Oneness of Allah) who does wrong, we shall punish him, and then he will be brought back unto his Lord, Who will punish him with a terrible torment (Hell).

(263) And on that Day We shall present Hell to the disbelievers, plain to view -

(264) Do then those who disbelieved think that they can take My slaves [i.e., the angels, Allah's Messengers, 'Îsa (Jesus), son of Maryam (Mary)] as Auliya' (lords, gods, protectors) besides Me? Verily, We have prepared Hell as an entertainment for the disbelievers (in the Oneness of Allah - Islamic Monotheism) .

(265) "That shall be their recompense, Hell; because they disbelieved and took My Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and My Messengers by way of jest and mockery.

(266) Then the sects differed [i.e. the Christians about 'Îsa (Jesus) عليه السلام], so woe unto the disbelievers [those who gave false witness by saying that 'Îsa (Jesus) is the son of Allah] from the Meeting of a great Day (i.e. the Day of Resurrection, when they will be thrown in the blazing Fire) .

(267) How clearly will they (polytheists and disbelievers in the Oneness of Allah) see and hear the Day when they will appear before Us! But the Zalimun (polytheists and wrong-doers) today are in plain error.

(268) And man (the disbeliever) says: "When I am dead, shall I then be raised up alive?"

(269) And when Our Clear Verses are recited to them, those who disbelieve (the rich and strong among the pagans of Quraish who live a life of luxury) say to those who believe (the weak, poor companions of Prophet Muhammad صلى الله عليه وسلم who have a hard life): "Which of the two groups (i.e. believers or disbelievers) is best in (point of) position and as regards station (place of council for consultation)."

(270) Have you seen him who disbelieved in Our Ayat (this Qur'an and Muhammad صلى الله عليه وسلم) and said: "I shall certainly be given wealth and children [if I will be alive (again)]."