The word(s) "turn" appears 446 time(s) in 410 verse(s) in Quran in Mohsin Khan translation.

(321) And in whatsoever you differ, the decision thereof is with Allah (He is the ruling Judge). (And say O Muhammad صلى الله عليه و سلم to these polytheists:) Such is Allah, my Lord in Whom I put my trust, and to Him I turn (in all of my affairs and) in repentance.

(322) He (Allah) has ordained for you the same religion (Islamic Monotheism) which He ordained for Nuh (Noah), and that which We have revealed to you (O Muhammad صلى الله عليه و سلم), and that which We ordained for Ibrahim (Abraham), Musa (Moses) and 'Îsa (Jesus) saying you should establish religion (i.e. to do what it orders you to do practically), and make no divisions in it (religion) (i.e. various sects in religion). Intolerable for the Mushrikun, is that (Islamic Monotheism) to which you (O Muhammad صلى الله عليه و سلم) call them. Allah chooses for Himself whom He wills, and guides unto Himself who turns to Him in repentance and in obedience.

(323) So unto this (religion of Islam alone and this Qur'an) then invite (people) (O Muhammad صلى الله عليه و سلم), and stand firm [on Islamic Monotheism by performing all that is ordained by Allah (good deeds), and by abstaining from all that is forbidden by Allah (sins and evil deeds)], as you are commanded, and follow not their desires but say: "I believe in whatsoever Allah has sent down of the Book [all the holy Books, - this Qur'an and the Books of the old from the Taurat (Torah), or the Injeel (Gospel) or the Pages of Ibrahim (Abraham)] and I am commanded to do justice among you. Allah is our Lord and your Lord. For us our deeds and for you your deeds. There is no dispute between us and you. Allah will assemble us (all), and to Him is the final return."

(324) And whomsoever Allah sends astray, for him there is no Wali (protector, helper, guardian) after Him. And you will see the Zalimun (polytheists, wrong-doers, oppressors): when they behold the torment, they will say: "Is there any way of return (to the world)?"

(325) But if they turn away (O Muhammad صلى الله عليه و سلم from the Islamic Monotheism, which you have brought to them). We have not sent you (O Muhammad صلى الله عليه و سلم) as a Hafiz (watcher, protector) over them (i.e. to take care of their deeds and to recompense them). Your duty is to convey (the Message). And verily, when We cause man to taste of Mercy from Us, he rejoices thereat; but when some ill befalls them because of the deeds which their hands have sent forth, then verily, man (becomes) ingrate!

(326) And verily, to Our Lord we indeed are to return!"

(327) And he made it [i.e. La ilaha illallah (none has the right to be worshipped but Allah Alone)] a Word lasting among his offspring, (True Monotheism), that they may turn back (i.e. to repent to Allah or receive admonition).

(328) And whosoever turns away blindly from the remembrance of the Most Gracious (Allah) (i.e. this Qur'an and worship of Allah), We appoint for him Shaitan (Satan - devil) to be a Qarin (a companion) to him.

(329) It will profit you not this Day (O you who turn away from Allah's remembrance and His worship) as you did wrong, (and) that you will be sharers (you and your Qarin ) in the punishment.

(330) And not an Ayah (sign, etc.) We showed them but it was greater than its fellow , and We seized them with torment, in order that they might turn [from their polytheism to Allah's religion (Islamic Monotheism)].