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

(221) (It will be said): "This is what you were promised - (it is) for those oft-returning (to Allah) in sincere repentance, and those who preserve their covenant with Allah (by obeying Him in all what He has ordered, and worshipping none but Allah Alone, i.e. follow Allah's religion - Islamic monotheism).

(222) Then he conceived fear of them (when they ate not). They said: "Fear not." And they gave him glad tidings of a son having knowledge (about Allah and His religion of True monotheism).

(223) So flee to Allah (from His Torment to His Mercy - Islamic monotheism). Verily, I (Muhammad صلى الله عليه وسلم) am a plain warner to you from Him.

(224) Then woe to those who disbelieve (in Allah and His Oneness - Islamic monotheism) from their Day which they have been promised (for their punishment).

(225) Therefore, remind (mankind of Islamic monotheism, O Muhammad صلى الله عليه وسلم). By the Grace of Allah, you are neither a soothsayer, nor a madman.

(226) Or is it that you (O Muhammad صلى الله عليه وسلم) ask a wage from them (for your preaching of Islamic monotheism) so that they are burdened with a load of debt?

(227) Or do they intend a plot (against you O Muhammad صلى الله عليه وسلم)? But those who disbelieve (in the Oneness of Allah - Islamic monotheism) are themselves plotted against!

(228) So on that Day no question will be asked of man or jinns as to his sin, [because they have already been known from their faces either white (dwellers of Paradise - true believers of Islamic monotheism) or black (dwellers of Hell - polytheists; disbelievers, criminals)].

(229) And those foremost [(in Islamic Faith of monotheism and in performing righteous deeds) in the life of this world on the very first call for to embrace Islam] will be foremost (in Paradise).

(230) But if he (the dying person) be of the denying (of the Resurrection), the erring (away from the Right Path of Islamic monotheism),