The word(s) "used" appears 281 time(s) in 264 verse(s) in Quran in Mohsin Khan translation.

(81) Those who believed (in the Oneness of Allah - Islamic Monotheism), and used to fear Allah much (by abstaining from evil deeds and sins and by doing righteous deeds).

(82) (A brief) enjoyment in this world! - and then unto Us will be their return, then We shall make them taste the severest torment because they used to disbelieve [in Allah, belie His Messengers, deny and challenge His Ayat (proofs, signs, verses, etc.)].

(83) Now (you believe) while you refused to believe before and you were one of the Mufsidun (evil-doers, the corrupters).

(84) And indeed We settled the Children of Israel in an honourable dwelling place (Sham and Misr), and provided them with good things, and they differed not until the knowledge came to them. Verily, Allah will judge between them on the Day of Resurrection in that in which they used to differ.

(85) And if We delay the torment for them till a determined term, they are sure to say, "What keeps it back?" Verily, on the day it reaches them, nothing will turn it away from them, and they will be surrounded by (or fall in) that at which they used to mock!

(86) They are those for whom there is nothing in the Hereafter but Fire, and vain are the deeds they did therein. And of no effect is that which they used to do.

(87) By no means will they escape (from Allah's Torment) on earth, nor have they protectors besides Allah! Their torment will be doubled! They could not bear to hear (the preachers of the truth) and they used not to see (the truth because of their severe aversion, in spite of the fact that they had the sense of hearing and sight).

(88) And it was revealed to Nuh (Noah): "None of your people will believe except those who have believed already. So be not sad because of what they used to do.

(89) Verily, Ibrahim (Abraham) was, without doubt, forbearing, used to invoking Allah with humility, and was repentant (to Allah all the time, again and again).

(90) And his people came rushing towards him, and since aforetime they used to commit crimes (sodomy), he said: "O my people! Here are my daughters (i.e. the women of the nation), they are purer for you (if you marry them lawfully). So fear Allah and degrace me not with regard to my guests! Is there not among you a single right-minded man?"