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

(141) Whosoever disbelieves will suffer from his disbelief, and whosoever does righteous good deeds (by practising Islamic monotheism), then such will prepare a good place (in Paradise) for themselves (and will be saved by Allah from His Torment).

(142) That He may reward those who believe (in the Oneness of Allah - Islamic monotheism), and do righteous good deeds, out of His Bounty. Verily, He likes not the disbelievers.

(143) Verily, those who believe (in Islamic monotheism) and do righteous good deeds, for them are Gardens of Delight (Paradise).

(144) "O my son! Aqim-As-Salat (perform As-Salat), enjoin (on people) Al-Ma'ruf - (Islamic monotheism and all that is good), and forbid (people) from Al-Munkar (i.e. disbelief in the Oneness of Allah, polytheism of all kinds and all that is evil and bad), and bear with patience whatever befalls you. Verily, these are some of the important commandments (ordered by Allah with no exemption).

(145) See you not (O men) that Allah has subjected for you whatsoever is in the heavens and whatsoever is in the earth, and has completed and perfected His Graces upon you, (both) apparent (i.e. Islamic monotheism, and the lawful pleasures of this world, including health, good looks, etc.) and hidden [i.e. One's Faith in Allah (of Islamic monotheism) knowledge, wisdom, guidance for doing righteous deeds, and also the pleasures and delights of the Hereafter in Paradise]? Yet of mankind is he who disputes about Allah without knowledge or guidance or a Book giving light!

(146) As for those who believe (in the Oneness of Allah - Islamic monotheism) and do righteous good deeds, for them are Gardens (Paradise) as an entertainment for what they used to do.

(147) Verily, the Muslims (those who submit to Allah in Islam) men and women, the believers men and women (who believe in Islamic monotheism), the men and the women who are obedient (to Allah), the men and women who are truthful (in their speech and deeds), the men and the women who are patient (in performing all the duties which Allah has ordered and in abstaining from all that Allah has forbidden), the men and the women who are humble (before their Lord - Allah), the men and the women who give Sadaqat (i.e. Zakat, and alms), the men and the women who observe Saum (fast) (the obligatory fasting during the month of Ramadan, and the optional Nawafil fasting), the men and the women who guard their chastity (from illegal sexual acts) and the men and the women who remember Allah much with their hearts and tongues Allah has prepared for them forgiveness and a great reward (i.e. Paradise).

(148) He it is Who sends Salat (His blessings) on you, and His angels too (ask Allah to bless and forgive you), that He may bring you out from darkness (of disbelief and polytheism) into light (of Belief and Islamic monotheism). And He is Ever Most Merciful to the believers.

(149) 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 ).

(150) So that Allah will punish the hypocrites, men and women, and the men and women who are Al-Mushrikun (polytheists, idolaters, pagans, disbelievers, in the Oneness of Allah, and His Messenger Muhammad صلى الله عليه وسلم). And Allah will pardon (accept the repentance of) the true believers of the Islamic monotheism, men and women. And Allah is Ever Oft-Forgiving, Most Merciful.