The word(s) "but" appears 1287 time(s) in 1137 verse(s) in Quran in Mohsin Khan translation.

(511) And We gave them Our Signs, but they were averse to them.

(512) but As-Saihah (torment - awful cry) overtook them in the early morning (of the fourth day of their promised punishment days).

(513) Who set up along with Allah another ilah (god); but they will come to know.

(514) He sends down the angels with the Ruh (revelation) of His Command to whom of His slaves He wills (saying): "Warn mankind that La ilaha illa Ana (none has the right to be worshipped but I), so fear Me (by abstaining from sins and evil deeds).

(515) And upon Allah is the responsibility to explain the Straight Path . but there are ways that turn aside (such as Paganism, Judaism and Christianity). And had He willed, He would have guided you all (mankind).

(516) Those whom they (Al-Mushrikun ) invoke besides Allah have not created anything, but are themselves created.

(517) Your Ilah (God) is One Ilah (God - Allah, none has the right to be worshipped but He). but for those who believe not in the Hereafter, their hearts deny (the faith in the Oneness of Allah), and they are proud.

(518) Those before them indeed plotted, but Allah struck at the foundation of their building, and then the roof fell down upon them, from above them, and the torment overtook them from directions they did not perceive.

(519) Those whose lives the angels take while they are in a pious state (i.e. pure from all evil, and worshipping none but Allah Alone) saying (to them): Salamun 'Alaikum (peace be on you) enter you Paradise, because of that (the good) which you used to do (in the world)."

(520) Do they (the disbelievers and polytheists) await but that the angels should come to them [to take away their souls (at death)], or there should come the command (i.e. the torment or the Day of Resurrection) of your Lord? Thus did those before them. And Allah wronged them not, but they used to wrong themselves.