The word(s) "guard" appears 80 time(s) in 76 verse(s) in Quran in Abdullah Yusuf Ali translation.

(51) Is, then, one who has to fear the brunt of the Penalty on the Day of Judgment (and receive it) on his face, (like one guarded therefrom)? It will be said to the wrong-doers: "Taste ye (the fruits of) what ye earned!"

(52) (It is) a Qur'an in Arabic, without any crookedness (therein): in order that they may guard against Evil.

(53) Allah is the Creator of all things, and He is the guardian and Disposer of all affairs.

(54) So He completed them as seven firmaments in two Days, and He assigned to each heaven its duty and command. And We adorned the lower heaven with lights, and (provided it) with guard. Such is the Decree of (Him) the Exalted in Might, Full of Knowledge.

(55) If then they run away, We have not sent thee as a guard over them. Thy duty is but to convey (the Message). And truly, when We give man a taste of a Mercy from Ourselves, he doth exult thereat, but when some ill happens to him, on account of the deeds which his hands have sent forth, truly then is man ungrateful!

(56) The life of this world is but play and amusement: and if ye believe and guard against Evil, He will grant you your recompense, and will not ask you (to give up) your possessions.

(57) We already know how much of them the earth takes away: With Us is a record guarding (the full account).

(58) Behold, two (guardian angels) appointed to learn (his doings) learn (and noted them), one sitting on the right and one on the left.

(59) Round about them will serve, (devoted) to them, young male servants (handsome) as Pearls well-guarded.

(60) Those who avoid great sins and shameful deeds, only (falling into) small faults,- verily thy Lord is ample in forgiveness. He knows you well when He brings you out of the earth, And when ye are hidden in your mothers' wombs. Therefore justify not yourselves: He knows best who it is that guards against evil.