The word(s) "worship" appears 429 time(s) in 354 verse(s) in Quran in Mohsin Khan translation.

(281) Is not Allah Sufficient for His slave? Yet they try to frighten you with those (whom they worship) besides Him! And whom Allah sends astray, for him there will be no guide.

(282) And when Allah Alone is mentioned, the hearts of those who believe not in the Hereafter are filled with disgust (from the Oneness of Allah توحيد الله) and when those (whom they obey or worship) besides Him [like all false deities other than Allah, - it may be a Messenger, an angel, a pious man, a jinni, or any other creature even idols, graves of religious people, saints, priests, monks and others.] are mentioned, behold, they rejoice!

(283) Lest a person should say: "Alas, my grief that I was undutiful to Allah (i.e. I have not done what Allah has ordered me to do), and I was indeed among those who mocked [at the truth! i.e. La ilaha illallah (none has the right to be worshipped but Allah), the Qur'an, and Muhammad صلى الله عليه وسلم and at the faithful believers]

(284) Say (O Muhammad صلى الله عليه وسلم to the polytheists): "Do you order me to worship other than Allah? O you fools!"

(285) And indeed it has been revealed to you (O Muhammad صلى الله عليه وسلم), as it was to those (Allah's Messengers) before you: "If you join others in worship with Allah, (then) surely (all) your deeds will be in vain, and you will certainly be among the losers."

(286) Nay! But worship Allah (Alone and none else), and be among the grateful.

(287) The Forgiver of sin, the Acceptor of repentance, the Severe in punishment, the Bestower (of favours). La ilaha illa Huwa (none has the right to be worshipped but He), to Him is the final return.

(288) (It will be said): "This is because, when Allah Alone was invoked (in worship) you disbelieved (denied), but when partners were joined to Him, you believed! So the judgement is only with Allah, the Most High, the Most Great! "

(289) It is He Who shows you His Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and sends down (rain with which grows) provision for you from the sky. And none remembers but those who turn (to Allah in obedience and) in repentance (by begging His Pardon and by worshipping and obeying Him Alone and none else).

(290) So, call you (O Muhammad صلى الله عليه وسلم and the believers) upon (or invoke) Allah making (your) worship pure for Him (Alone) (by worshipping none but Him and by doing religious deeds sincerely for Allah's sake only and not to show off and not to set up rivals with Him in worship), however much the disbelievers (in the Oneness of Allah) may hate (it).