The word(s) "reckon" appears 40 time(s) in 39 verse(s) in Quran in Mohsin Khan translation.

(11) That Allah may requite each person according to what he has earned. Truly, Allah is Swift at reckoning.

(12) And We have appointed the night and the day as two Ayat (signs etc.). Then, We have obliterated the sign of the night (with darkness) while We have made the sign of the day illuminating, that you may seek bounty from your Lord, and that you may know the number of the years and the reckoning. And We have explained everything (in detail) with full explanation.

(13) (It will be said to him): "Read your book. You yourself are sufficient as a reckoner against you this Day."

(14) "Therefore, let not the one who believes not therein (i.e. in the Day of Resurrection, reckoning, Paradise and Hell.), but follows his own lusts, divert you therefrom, lest you perish.

(15) Draws near for mankind their reckoning, while they turn away in heedlessness.

(16) And they ask you to hasten on the torment! And Allah fails not His Promise. And verily, a day with your Lord is as a thousand years of what you reckon.

(17) And those who give that (their charity) which they give (and also do other good deeds) with their hearts full of fear (whether their alms and charities have been accepted or not), because they are sure to return to their Lord (for reckoning).

(18) And whoever invokes (or worships), besides Allah, any other ilah (god), of whom he has no proof; then his reckoning is only with his Lord. Surely! Al-Kafirun (the disbelievers in Allah and in the Oneness of Allah, polytheists, pagans, idolaters) will not be successful.

(19) And (remember) the Day when We shall gather out of every nation a troop of those who denied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), and (then) they (all) shall be driven (to the place of reckoning),

(20) Till, when they come (before their Lord at the place of reckoning), He will say: "Did you deny My Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) whereas you comprehended them not by knowledge (of their truth or falsehood), or what (else) was it that you used to do?"