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

(861) So they plotted a plot against him, but We made them the lowest.

(862) but they denied him [Iliyas (Elias)], so they will certainly be brought forth (to the punishment),

(863) but We cast him forth on the naked shore while he was sick,

(864) And they have invented a kinship between Him and the jinn, but the jinn know well that they have indeed to appear (before Him) (i.e. they will be called to account).

(865) Glorified be Allah! (He is free) from what they attribute unto Him!

(866) 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).

(867) And there is not one of us (angels) but has his known place (or position);

(868) but (now that the Qur'an has come) they disbelieve therein (i.e. in the Qur'an and in Prophet Muhammad صلى الله عليه وسلم , and all that he brought, - the Divine Revelation), so they will come to know!

(869) Glorified be your Lord, the Lord of Honour and Power! (He is free) from what they attribute unto Him!

(870) Sad. [These letters (Sad, etc.) are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings]. By the Qur'an full of reminding (explanations and honour for the one who believes in it).