The word(s) "belief" appears 136 time(s) in 116 verse(s) in Quran in Mohsin Khan translation.

(21) O Messenger (Muhammad صلى الله عليه وسلم)! Let not those who hurry to fall into disbelief grieve you, of such who say: "We believe" with their mouths but their hearts have no faith. And of the Jews are men who listen much and eagerly to lies - listen to others who have not come to you. They change the words from their places; they say, "If you are given this, take it, but if you are not given this, then beware!" And whomsoever Allah wants to put in Al-Fitnah [error, because of his rejecting of Faith], you can do nothing for him against Allah. Those are the ones whose hearts Allah does not want to purify (from disbelief and hypocrisy); for them there is a disgrace in this world, and in the Hereafter a great torment.

(22) When they come to you, they say: "We believe." But in fact they enter with (an intention of) disbelief and they go out with the same. And Allah knows all what they were hiding.

(23) The Jews say: "Allah's Hand is tied up (i.e. He does not give and spend of His Bounty)." Be their hands tied up and be they accursed for what they uttered. Nay, both His Hands are widely outstretched. He spends (of His Bounty) as He wills. Verily, the Revelation that has come to you from your Lord (Allah) increases in most of them (their) obstinate rebellion and disbelief. We have put enmity and hatred amongst them till the Day of Resurrection. Every time they kindled the fire of war, Allah extinguished it; and they (ever) strive to make mischief on the earth. And Allah does not like the Mufsidun (mischief-makers).

(24) Say (O Muhammad صلى الله عليه وسلم) "O people of the Scripture (Jews and Christians)! You have nothing (as regards guidance) till you act according to the Taurat (Torah), the Injeel (Gospel), and what has (now) been sent down to you from your Lord (the Qur'an)." Verily, that which has been sent down to you (Muhammad صلى الله عليه وسلم) from your Lord increases in most of them (their) obstinate rebellion and disbelief. So be not sorrowful over the people who disbelieve.

(25) They used not to forbid one another from Al-Munkar (wrong, evil-doing, sins, polytheism, disbelief) which they committed. Vile indeed was what they used to do.

(26) O you who believe! Make not unlawful the Tayyibat (all that is good as regards foods, things, deeds, beliefs, persons) which Allah has made lawful to you, and transgress not. Verily, Allah does not like the transgressors.

(27) Say (O Muhammad صلى الله عليه وسلم): "Not equal are Al-Khabith (all that is evil and bad as regards things, deeds, beliefs, persons and foods) and At-Taiyyib (all that is good as regards things, deeds, beliefs, persons, foods), even though the abundance of Al-Khabith may please you." So fear Allah , O men of understanding in order that you may be successful.

(28) O you who believe! Take care of your ownselves . If you follow the (right) guidance [and enjoin what is right (Islamic Monotheism and all that Islam orders one to do) and forbid what is wrong (polytheism, disbelief and all that Islam has forbidden)] no hurt can come to you from those who are in error. The return of you all is to Allah, then He will inform you about (all) that which you used to do.

(29) But those who reject Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), the torment will touch them for their disbelief (and for their belying the Message of Muhammad صلى الله عليه وسلم). [Tafsir Al-Qurtubi].

(30) It is those who believe (in the Oneness of Allah and worship none but Him Alone) and confuse not their belief with Zulm (wrong i.e. by worshipping others besides Allah), for them (only) there is security and they are the guided.