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

(31) And Musa chose out of his people seventy men for Our appointment; so when the earthquake overtook them, he said: My Lord! if Thou hadst pleased, Thou hadst destroyed them before and myself (too); wilt Thou destroy us for what the fools among us have done? It is naught but Thy trial, Thou makest err with it whom Thou pleasest and guidest whom Thou pleasest: Thou art our Guardian, therefore forgive us and have mercy on us, and Thou art the best of the forgivers.

(32) And Allah's are the best names, therefore call on Him thereby, and leave alone those who violate the sanctity of His names; they shall be recompensed for what they did.

(33) And when those who disbelieved devised plans against you that they might confine you or slay you or drive you away; and they devised plans and Allah too had arranged a plan; and Allah is the best of planners.

(34) Allah has promised to the believing men and the believing women gardens, beneath which rivers flow, to abide in them, and goodly dwellings in gardens of perpetual abode; and best of all is Allah's goodly pleasure; that is the grand achievement.

(35) Nor do they spend anything that may be spent, small or great, nor do they traverse a valley, but it is written down to their credit, that Allah may reward them with the best of what they have done.

(36) And of them is he who believes in it, and of them is he who does not believe in it, and your Lord best knows the mischief-makers.

(37) And follow what is revealed to you and be patient till Allah should give judgment, and He is the best of the judges.

(38) And you that ask forgiveness of your Lord, then turn to Him; He will provide you with a goodly provision to an appointed term and bestow His grace on every one endowed with grace, and if you turn back, then surely I fear for you the chastisement of a great day.

(39) And He it is Who created the heavens and the earth in six periods-- and His dominion (extends) on the water-- that He might manifest to you, which of you is best in action, and if you say, surely you shall be raised up after death, those who disbelieve would certainly say: This is nothing but clear magic.

(40) And I do not say to you that I have the treasures of Allah and I do not know the unseen, nor do I say that I am an angel, nor do I say about those whom your eyes hold in mean estimation (that) Allah will never grant them (any) good-- Allah knows best what is in their souls-- for then most surely I should be of the unjust.