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

(241) (It will be said in the Hereafter) O you who disbelieve (in the Oneness of Allah - Islamic monotheism)! Make no excuses this Day! You are being requited only for what you used to do.

(242) Is he who walks prone (without seeing) on his face, more rightly guided, or he who (sees and) walks upright on the Straight Way (i.e. Islamic monotheism)?

(243) So (O Muhammad صلى الله عليه وسلم) obey you not the deniers [(of Islamic monotheism - those who belie the Verses of Allah), the Oneness of Allah, and the Messengership of Muhammad صلى الله عليه وسلم]

(244) Shall We then treat the Muslims (believers of Islamic monotheism, doers of righteous deeds) like the Mujrimun (criminals, polytheists and disbelievers, etc.)?

(245) He said: "O my Lord! Verily, I have called to my people night and day (i.e. secretly and openly to accept the doctrine of Islamic monotheism),

(246) 'And indeed when we heard the Guidance (this Qur'an), we believed therein (Islamic monotheism), and whosoever believes in his Lord shall have no fear, either of a decrease in the reward of his good deeds or an increase in the punishment for his sins.

(247) "(Mine is) but conveyance (of the truth) from Allah and His Messages (of Islamic monotheism), and whosoever disobeys Allah and His Messenger, then Verily, for him is the Fire of Hell, he shall dwell therein forever."

(248) Except those on the Right, (i.e. the pious true believers of Islamic monotheism).

(249) Verily,, the Abrar (the pious believers of Islamic monotheism), shall drink of a cup mixed with (water from a spring in Paradise called) Kafur

(250) About the great news, (i.e. Islamic monotheism, the Qur'an, which Prophet Muhammad صلى الله عليه وسلم brought and the Day of Resurrection)