The word(s) "best" appears 144 time(s) in 132 verse(s) in Quran in Muhammad Habib Shakir translation.

(61) Say: Call upon Allah or call upon, the Beneficent Allah; whichever you call upon, He has the best names; and do not utter your prayer with a very raised voice nor be silent with regard to it, and seek a way between these.

(62) Surely We have made whatever is on the earth an embellishment for it, so that We may try them (as to) which of them is best in works.

(63) Then We raised them up that We might know which of the two parties was best able to compute the time for which they remained.

(64) And thus did We rouse them that they might question each other. A speaker among them said: How long have you tarried? They said: We have tarried for a day or a part of a day. (Others) said: Your Lord knows best how long you have tarried. Now send one of you with this silver (coin) of yours to the city, then let him see which of them has purest food, so let him bring you provision from it, and let him behave with gentleness, and by no means make your case known to any one:

(65) And thus did We make (men) to get knowledge of them that they might know that Allah's promise is true and that as for the hour there is no doubt about it. When they disputed among themselves about their affair and said: Erect an edifice over them-- their Lord best knows them. Those who prevailed in their affair said: We will certainly raise a masjid over them.

(66) (Some) say: (They are) three, the fourth of them being their dog; and (others) say: Five, the sixth of them being their dog, making conjectures at what is unknown; and (others yet) say: Seven, and the eighth of them is their dog. Say: My Lord best knows their number, none knows them but a few; therefore contend not in the matter of them but with an outward contention, and do not question concerning them any of them.

(67) Say: Allah knows best how long they remained; to Him are (known) the unseen things of the heavens and the earth; how clear His sight and how clear His hearing! There is none to be a guardian for them besides Him, and He does not make any one His associate in His Judgment.

(68) Here is protection only Allah's, the True One; He is best in (the giving of) reward and best in requiting.

(69) These are they on whom Allah bestowed favors, from among the prophets of the seed of Adam, and of those whom We carried with Nuh, and of the seed of Ibrahim and Israel, and of those whom We guided and chose; when the communications of the Beneficent Allah were recited to them, they fell down making obeisance and weeping.

(70) Again We do certainly know best those who deserve most to be burned therein.