The word(s) "believes" appears 45 time(s) in 42 verse(s) in Quran in Muhammad Habib Shakir translation.

(21) And of them is he who believes in it, and of them is he who does not believe in it, and your Lord best knows the mischief-makers.

(22) Is he then who has with him clear proof from his Lord, and a witness from Him recites it and before it (is) the Book of Musa, a guide and a mercy? These believe in it; and whoever of the (different) parties disbelieves in it, surely it is the truth from your Lord, but most men do not believe.

(23) He who disbelieves in Allah after his having believed, not he who is compelled while his heart is at rest on account of faith, but he who opens (his) breast to disbelief-- on these is the wrath of Allah, and they shall have a grievous chastisement.

(24) And as for him who believes and does good, he shall have goodly reward, and We will speak to him an easy word of Our command.

(25) Have you, then, seen him who disbelieves in Our communications and says: I shall certainly be given wealth and children?

(26) Therefore let not him who believes not in it and follows his low desires turn you away from it so that you should perish;

(27) And most surely I am most Forgiving to him who repents and believes and does good, then continues to follow the right direction.

(28) Except him who repents and believes and does a good deed; so these are they of whom Allah changes the evil deeds to good ones; and Allah is Forgiving, Merciful.

(29) But as to him who repents and believes and does good, maybe he will be among the successful:

(30) And those who were given the knowledge said: Woe to you! Allah's reward is better for him who believes and does good, and none is made to receive this except the patient.