The word(s) "disbeliever" appears 160 time(s) in 151 verse(s) in Quran in Muhammad Pickthal translation.

(31) O Ye who believe! Choose not for guardians such of those who received the Scripture before you, and of the disbelievers, as make a jest and sport of your religion. But keep your duty to Allah if ye are true believers.

(32) Say (unto the disbelievers): Travel in the land, and see the nature of the consequence for the rejecters!

(33) Of them are some who listen unto thee, but We have placed upon their hearts veils, lest they should understand, and in their ears a deafness. If they saw every token they would not believe therein; to the point that, when they come unto thee to argue with thee, the disbelievers say: This is naught else than fables of the men of old.

(34) Say (O Muhammad, to the disbelievers): I say not unto you (that) I possess the treasures of Allah, nor that I have knowledge of the Unseen; and I say not unto you: Lo! I am an angel. I follow only that which is inspired in me. Say: Are the blind man and the seer equal? Will ye not then take thought?

(35) Those are they unto whom We gave the Scripture and command and prophethood. But if these disbelieve therein, then indeed We shall entrust it to a people who will not be disbelievers therein.

(36) Is he who was dead and We have raised him unto life, and set for him a light wherein he walketh among men, as him whose similitude is in utter darkness whence he cannot emerge? Thus is their conduct made fairseeming for the disbelievers.

(37) O ye assembly of the jinn and humankind! Came there not unto you messengers of your own who recounted unto you My tokens and warned you of the meeting of this your Day? They will say: We testify against ourselves. And the life of the world beguiled them. And they testify against themselves that they were disbelievers.

(38) Who doeth greater wrong than he who inventeth a lie concerning Allah or denieth Our tokens. (For such) their appointed portion of the Book (of destiny) reacheth them till, when Our messengers come to gather them, they say: Where (now) is that to which ye cried beside Allah? They say: They have departed from us. And they testify against themselves that they were disbelievers.

(39) Who debar (men) from the path of Allah and would have it crooked, and who are disbelievers in the Last Day.

(40) And the dwellers of the Fire cry out unto the dwellers of the Garden: Pour on us some water or some wherewith Allah hath provided you. They say: Lo! Allah hath forbidden both to disbelievers (in His guidance),