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

(241) And when harm touches men, they cry sincerely only to their Lord (Allah), turning to Him in repentance; but when He gives them a taste of His Mercy, behold, a party of them associates partners in worship with their Lord.

(242) And indeed We did send Messengers before you (O Muhammad صلى الله عليه وسلم) to their own peoples. They came to them with clear proofs, then, We took vengeance on those who committed crimes (disbelief, setting partners in worship with Allah, sins); and (as for) the believers, it was incumbent upon Us to help (them).

(243) So on that Day no excuse of theirs will avail those who did wrong (by associating partners in worship with Allah, and by denying the Day of Resurrection), nor will they be allowed (then) to return to seek Allah's Pleasure (by having Islamic Faith with righteous deeds and by giving up polytheism, sins and crimes with repentance).

(244) This is the creation of Allah. So show Me that which those (whom you worship) besides Him have created. Nay, the Zalimun (polytheists, wrongdoers and those who do not believe in the Oneness of Allah) are in plain error.

(245) And (remember) when Luqman said to his son when he was advising him: "O my son! Join not in worship others with Allah. Verily joining others in worship with Allah is a great Zulm (wrong) indeed.

(246) But if they (both) strive with you to make you join in worship with Me others that of which you have no knowledge, then obey them not; but behave with them in the world kindly, and follow the path of him who turns to Me in repentance and in obedience. Then to Me will be your return, and I shall tell you what you used to do.

(247) And whosoever submits his face (himself) to Allah, while he is a Muhsin (good-doer i.e. performs good deeds totally for Allah's sake without any show off or to gain praise or fame and does them in accordance with the Sunnah of Allah's Messenger Muhammad صلى الله عليه وسلم), then he has grasped the most trustworthy handhold [La ilaha illallah (none has the right to be worshipped but Allah)]. And to Allah return all matters for decision.

(248) And as one who invites to Allah [Islamic Monotheism, i.e. to worship none but Allah (Alone)] by His Leave, and as a lamp spreading light (through your instructions from the Qur'an and the Sunnah - the legal ways of the Prophet صلى الله عليه وسلم ).

(249) And (remember) the Day when He will gather them all together, then He will say to the angels: "Was it you that these people used to worship?"

(250) They (the angels) will say: "Glorified be You! You are our Wali (Lord) instead of them. Nay, but they used to worship the jinn; most of them were believers in them."