The word(s) "regular" appears 65 time(s) in 45 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) "To establish regular prayers and to fear Allah: for it is to Him that we shall be gathered together."

(12) "And ordain for us that which is good, in this life and in the Hereafter: for we have turned unto Thee." He said: "With My punishment I visit whom I will; but My mercy extendeth to all things. That (mercy) I shall ordain for those who do right, and practise regular charity, and those who believe in Our signs;-

(13) As to those who hold fast by the Book and establish regular prayer,- never shall We suffer the reward of the righteous to perish.

(14) Who establish regular prayers and spend (freely) out of the gifts We have given them for sustenance:

(15) But when the forbidden months are past, then fight and slay the Pagans wherever ye find them, an seize them, beleaguer them, and lie in wait for them in every stratagem (of war); but if they repent, and establish regular prayers and practise regular charity, then open the way for them: for Allah is Oft-forgiving, Most Merciful.

(16) But (even so), if they repent, establish regular prayers, and practise regular charity,- they are your brethren in Faith: (thus) do We explain the Signs in detail, for those who understand.

(17) The mosques of Allah shall be visited and maintained by such as believe in Allah and the Last Day, establish regular prayers, and practise regular charity, and fear none (at all) except Allah. It is they who are expected to be on true guidance.

(18) The Believers, men and women, are protectors one of another: they enjoin what is just, and forbid what is evil: they observe regular prayers, practise regular charity, and obey Allah and His Messenger. On them will Allah pour His mercy: for Allah is Exalted in power, Wise.

(19) We inspired Moses and his brother with this Message: "Provide dwellings for your people in Egypt, make your dwellings into places of worship, and establish regular prayers: and give glad tidings to those who believe!"

(20) And establish regular prayers at the two ends of the day and at the approaches of the night: For those things, that are good remove those that are evil: Be that the word of remembrance to those who remember (their Lord):