The word(s) "think" appears 88 time(s) in 85 verse(s) in Quran in Mohsin Khan translation.

(41) As for those who disbelieve, their deeds are like a mirage in a desert. The thirsty one thinks it to be water, until he comes up to it, he finds it to be nothing; but he finds Allah with him, Who will pay him his due (Hell). And Allah is Swift in taking account.

(42) And those who expect not a Meeting with Us (i.e. those who deny the Day of Resurrection and the life of the Hereafter) said: "Why are not the angels sent down to us, or why do we not see our Lord?" Indeed they think too highly of themselves, and are scornful with great pride.

(43) Or do you think that most of them hear or understand? They are only like cattle - nay, they are even farther astray from the Path (i.e. even worse than cattle).

(44) "You are but a human being like us and verily, we think that you are one of the liars!

(45) They said: "We have great strength, and great ability for war, but it is for you to command: so think over what you will command."

(46) And you will see the mountains and think them solid, but they shall pass away as the passing away of the clouds. The Work of Allah, Who perfected all things, verily He is Well-Acquainted with what you do.

(47) Fir'aun (Pharaoh) said: "O chiefs! I know not that you have an ilah (a god) other than me. So kindle for me (a fire), O Haman, to bake (bricks out of) clay, and set up for me a Sarh (a lofty tower, or palace) in order that I may look at (or look for) the Ilah (God) of Musa (Moses); and verily, I think that he [Musa (Moses)] is one of the liars."

(48) Do people think that they will be left alone because they say: "We believe," and will not be tested.

(49) Or think those who do evil deeds that they can outstrip Us (i.e. escape Our punishment)? Evil is that which they judge!

(50) Do they not think deeply (in their ownselves) about themselves (how Allah created them from nothing, and similarly He will resurrect them)? Allah has created not the heavens and the earth, and all that is between them, except with truth and for an appointed term. And indeed many of mankind deny the Meeting with their Lord. [Tafsir At-Tabari].