The word(s) "best" appears 206 time(s) in 195 verse(s) in Quran in Mohsin Khan translation.

(81) And lower unto them the wing of submission and humility through mercy, and say: "My Lord! bestow on them Your Mercy as they did bring me up when I was young."

(82) Your Lord knows best what is in your inner-selves. If you are righteous, then, verily, He is Ever Most Forgiving to those who turn unto Him again and again in obedience, and in repentance.

(83) We know best of what they listen to, when they listen to you. And when they take secret counsel, then the Zalimun (polytheists and wrong-doers) say: "You follow none but a bewitched man."

(84) And say to My slaves (i.e. the true believers of Islamic Monotheism) that they should (only) say those words that are the best. (Because) Shaitan (Satan) verily, sows a state of conflict and disagreements among them. Surely, Shaitan (Satan) is to man a plain enemy.

(85) Your Lord knows you best; if He wills, He will have mercy on you, or if He wills, He will punish you. And We have not sent you (O Muhammad صلى الله عليه و سلم) as a guardian over them.

(86) And your Lord knows best all who are in the heavens and the earth. And indeed, We have preferred some of the Prophets above others, and to Dawud (David) We gave the Zabur (Psalms).

(87) And when We bestow Our Grace on man (the disbeliever), he turns away and becomes arrogant (far away from the Right Path). And when evil touches him, he is in great despair.

(88) Say (O Muhammad صلى الله عليه و سلم to mankind): "Each one does according to Shakilatihi (i.e. his way or his religion or his intentions.), and your Lord knows best of him whose path (religion) is right."

(89) Say (O Muhammad صلى الله عليه و سلم): "Invoke Allah or invoke the Most Gracious (Allah), by whatever name you invoke Him (it is the same), for to Him belong the best Names. And offer your Salat (prayer) neither aloud nor in a low voice, but follow a way between.

(90) Verily! We have made that which is on earth as an adornment for it, in order that We may test them (mankind) as to which of them are best in deeds. [i.e. those who do good deeds in the most perfect manner, that means to do them (deeds) totally for Allah's sake and in accordance to the legal ways of the Prophet صلى الله عليه وسلم].