The word(s) "unbeliever" appears 179 time(s) in 160 verse(s) in Quran in Abdullah Yusuf Ali translation.

(61) Then, on the Day of Judgment, He will cover them with shame, and say: "Where are My 'partners' concerning whom ye used to dispute (with the godly)?" Those endued with knowledge will say: "This Day, indeed, are the unbelievers covered with shame and misery,-

(62) One Day We shall raise from all Peoples a Witness: then will no excuse be accepted from unbelievers, nor will they receive any favours.

(63) We only send the messengers to give Glad Tidings and to give warnings: But the unbelievers dispute with vain argument, in order therewith to weaken the truth, and they treat My Signs as a jest, as also the fact that they are warned!

(64) And We shall present Hell that day for unbelievers to see, all spread out,-

(65) (unbelievers) whose eyes had been under a veil from remembrance of Me, and who had been unable even to hear.

(66) Do the unbelievers think that they can take My servants as protectors besides Me? Verily We have prepared Hell for the unbelievers for (their) entertainment.

(67) But the sects differ among themselves: and woe to the unbelievers because of the (coming) Judgment of a Momentous Day!

(68) When Our Clear Signs are rehearsed to them, the unbelievers say to those who believe, "Which of the two sides is best in point of position? Which makes the best show in council?"

(69) Seest thou not that We have set the Evil Ones on against the unbelievers, to incite them with fury?

(70) Do not the unbelievers see that the heavens and the earth were joined together (as one unit of creation), before we clove them asunder? We made from water every living thing. Will they not then believe?