The word(s) "monotheism" appears 283 time(s) in 267 verse(s) in Quran in Mohsin Khan translation.

(61) "You do not worship besides Him but only names which you have named (forged) - you and your fathers - for which Allah has sent down no authority. The command (or the judgement) is for none but Allah. He has commanded that you worship none but Him (i.e. His monotheism); that is the (true) straight religion, but most men know not.

(62) Say (O Muhammad صلى الله عليه و سلم): "This is my way; I invite unto Allah (i.e. to the Oneness of Allah - Islamic monotheism) with sure knowledge, I and whosoever follows me (also must invite others to Allah i.e. to the Oneness of Allah - Islamic monotheism with sure knowledge). And Glorified and Exalted be Allah (above all that they associate as partners with Him). And I am not of the Mushrikun (polytheists, pagans, idolaters and disbelievers in the Oneness of Allah; those who worship others along with Allah or set up rivals or partners to Allah)."

(63) And if you (O Muhammad صلى الله عليه و سلم) wonder (at these polytheists who deny your message of Islamic monotheism and have taken besides Allah others for worship who can neither harm nor benefit), then wondrous is their saying: "When we are dust, shall we indeed then be (raised) in a new creation?" They are those who disbelieved in their Lord! They are those who will have iron chains tying their hands to their necks. They will be the dwellers of the Fire to abide therein.

(64) For those who answered their Lord's Call [believed in the Oneness of Allah and followed His Messenger Muhammad صلى الله عليه و سلم i.e. Islamic monotheism] is Al-Husna (i.e. Paradise). But those who answered not His Call (disbelieved in the Oneness of Allah and followed not His Messenger Muhammad صلى الله عليه و سلم), if they had all that is in the earth together with its like, they would offer it in order to save themselves (from the torment, but it will be in vain). For them there will be the terrible reckoning. Their dwelling-place will be Hell; and worst indeed is that place for rest.

(65) Those who believed (in the Oneness of Allah - Islamic monotheism), and whose hearts find rest in the remembrance of Allah: verily, in the remembrance of Allah do hearts find rest .

(66) Those who believed (in the Oneness of Allah - Islamic monotheism), and work righteousness, Tuba (all kinds of happiness or name of a tree in Paradise) is for them and a beautiful place of (final) return.

(67) Alif-Lam-Ra. [These letters are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings]. (This is) a Book which We have revealed unto you (O Muhammad صلى الله عليه و سلم) in order that you might lead mankind out of darkness (of disbelief and polytheism) into light (of belief in the Oneness of Allah and Islamic monotheism) by their Lord's Leave to the Path of the All-Mighty, the Owner of all Praise.

(68) Has not the news reached you, of those before you, the people of Nuh (Noah), and 'Ad, and Thamud? And those after them? None knows them but Allah. To them came their Messengers with clear proofs, but they put their hands in their mouths (biting them from anger) and said: "Verily, we disbelieve in that with which you have been sent, and we are really in grave doubt as to that to which you invite us (i.e. Islamic monotheism)."

(69) Their Messengers said: "What! Can there be a doubt about Allah, the Creator of the heavens and the earth? He calls you (to monotheism and to be obedient to Allah) that He may forgive you of your sins and give you respite for a term appointed." They said: "You are no more than human beings like us! You wish to turn us away from what our fathers used to worship. Then bring us a clear authority (i.e. a clear proof of what you say)."

(70) And you will see the Mujrimun (criminals, disbelievers in the Oneness of Allah - Islamic monotheism, polytheists) that Day Muqarranun (bound together) in fetters.