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

(161) And that you should worship Me [Alone - Islamic monotheism, and set up not rivals, associate-gods with Me]. That is the Straight Path.

(162) They will say: "It was you who used to come to us from the right side [i.e. from the right side of one of us and beautify for us every evil, enjoin on us polytheism, and stop us from the truth i.e. Islamic monotheism and from every good deed]."

(163) Nay! he (Muhammad صلى الله عليه وسلم) has come with the truth (i.e. Allah's religion - Islamic monotheism and this Qur'an) and he confirms the Messengers (before him who brought Allah's religion - Islamic monotheism).

(164) Save the chosen slaves of Allah (i.e. the true believers of Islamic monotheism).

(165) Except the chosen slaves of Allah (faithful, obedient, and true believers of Islamic monotheism).

(166) And, verily, among those who followed his [Nuh's (Noah)] way (Islamic monotheism) was Ibrahim (Abraham).

(167) When he came to his Lord with a pure heart [attached to Allah Alone and none else, worshipping none but Allah Alone - true Islamic monotheism, pure from the filth of polytheism].

(168) Except the slaves of Allah, whom He chooses (for His Mercy i.e. true believers of Islamic monotheism who do not attribute false things unto Allah).

(169) "We would have indeed been the chosen slaves of Allah (true believers of Islamic monotheism)!"

(170) And We created not the heaven and the earth and all that is between them without purpose! That is the consideration of those who disbelieve! Then woe to those who disbelieve (in Islamic monotheism) from the Fire!