The word(s) "guard" appears 74 time(s) in 69 verse(s) in Quran in Mohsin Khan translation.

(61) And Maryam (Mary), the daughter of 'Imran who guarded her chastity. And We breathed into (the sleeve of her shirt or her garment) through Our Ruh [i.e. Jibril (Gabriel) ], and she testified to the truth of the Words of her Lord [i.e. believed in the Words of Allah: "Be!" - and he was; that is 'Îsa (Jesus), son of Maryam (Mary) as a Messenger of Allah], and (also believed in) His Scriptures, and she was of the Qanitun (i.e. obedient to Allah) .

(62) And those who guard their chastity (i.e. private parts from illegal sexual acts).

(63) And those who guard their Salat (prayers) well.

(64) 'And we have sought to reach the heaven; but found it filled with stern guards and flaming fires.

(65) Except to a Messenger (from mankind) whom He has chosen (He informs him of unseen as much as He likes), and then He makes a band of watching guards (angels) to march before him and behind him.

(66) Over it are nineteen (angels as guardians and keepers of Hell).

(67) And We have set none but angels as guardians of the Fire. And We have fixed their number (19) only as a trial for the disbelievers, in order that the people of the Scripture (Jews and Christians) may arrive at a certainty [that this Qur'an is the truth as it agrees with their Books regarding the number (19) which is written in the Taurat (Torah) and the Injeel (Gospel)] and that the believers may increase in Faith (as this Qur'an is the truth), and that no doubt may be left for the people of the Scripture and the believers, and that those in whose hearts is a disease (of hypocrisy) and the disbelievers may say: "What Allah intends by this (curious) example ?" Thus Allah leads astray whom He wills and guides whom He wills. And none can know the hosts of your Lord but He. And this (Hell) is nothing else than a (warning) reminder to mankind.

(68) There is no human being but has a protector over him (or her) (i.e. angels in charge of each human being guarding him, writing his good and bad deeds)

(69) We will call out the guards of Hell (to deal with him)!