The word(s) "repent" appears 60 time(s) in 58 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) Know they not that Allah doth accept repentance from His votaries and receives their gifts of charity, and that Allah is verily He, the Oft-Returning, Most Merciful?

(22) Those that turn (to Allah) in repentance; that serve Him, and praise Him; that wander in devotion to the cause of Allah,: that bow down and prostrate themselves in prayer; that enjoin good and forbid evil; and observe the limit set by Allah;- (These do rejoice). So proclaim the glad tidings to the Believers.

(23) (He turned in mercy also) to the three who were left behind; (they felt guilty) to such a degree that the earth seemed constrained to them, for all its spaciousness, and their (very) souls seemed straitened to them,- and they perceived that there is no fleeing from Allah (and no refuge) but to Himself. Then He turned to them, that they might repent: for Allah is Oft-Returning, Most Merciful.

(24) See they not that they are tried every year once or twice? Yet they turn not in repentance, and they take no heed.

(25) Every soul that hath sinned, if it possessed all that is on earth, would fain give it in ransom: They would declare (their) repentance when they see the penalty: but the judgment between them will be with justice, and no wrong will be done unto them.

(26) "(And to preach thus), 'Seek ye the forgiveness of your Lord, and turn to Him in repentance; that He may grant you enjoyment, good (and true), for a term appointed, and bestow His abounding grace on all who abound in merit! But if ye turn away, then I fear for you the penalty of a great day:

(27) "And O my people! Ask forgiveness of your Lord, and turn to Him (in repentance): He will send you the skies pouring abundant rain, and add strength to your strength: so turn ye not back in sin!"

(28) To the Thamud People (We sent) Salih, one of their own brethren. He said: "O my people! Worship Allah: ye have no other god but Him. It is He Who hath produced you from the earth and settled you therein: then ask forgiveness of Him, and turn to Him (in repentance): for my Lord is (always) near, ready to answer."

(29) "But ask forgiveness of your Lord, and turn unto Him (in repentance): For my Lord is indeed full of mercy and loving-kindness."

(30) But verily thy Lord,- to those who do wrong in ignorance, but who thereafter repent and make amends,- thy Lord, after all this, is Oft-Forgiving, Most Merciful.