The word(s) "belief" appears 39 time(s) in 33 verse(s) in Quran in Muhammad Habib Shakir translation.

(31) He it is Who made you rulers in the land; therefore whoever disbelieves, his unbelief is against himself; and their unbelief does not increase the disbelievers with their Lord in anything except hatred; and their unbelief does not increase the disbelievers in anything except loss.

(32) But their belief was not going to profit them when they had seen Our punishment; (this is) Allah's law, which has indeed obtained in the matter of His servants, and there the unbelievers are lost.

(33) And know that among you is Allah's Apostle; should he obey you in many a matter, you would surely fall into distress, but Allah has endeared the faith to you and has made it seemly in your hearts, and He has made hateful to you unbelief and transgression and disobedience; these it is that are the followers of a right way.