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

(21) And among His Signs is that the heaven and the earth stand by His Command. Then afterwards when He will call you by a single call, behold, you will come out from the earth (i.e. from your graves for reckoning and recompense).

(22) He manages and regulates (every) affair from the heavens to the earth; then it (affair) will go up to Him, in one Day, the space whereof is a thousand years of your reckoning (i.e. reckoning of our present world's time).

(23) Those who convey the Message of Allah and fear Him, and fear none save Allah. And Sufficient is Allah as a reckoner.

(24) They cannot help them, but they will be brought forward as a troop against those who worshipped them (at the time of reckoning).

(25) They say: "Our Lord! Hasten to us Qittana (i.e. our Record of good and bad deeds so that we may see it) before the Day of reckoning!"

(26) O Dawud (David)! Verily! We have placed you as a successor on the earth; so judge you between men in truth (and justice) and follow not your desire - for it will mislead you from the Path of Allah. Verily, those who wander astray from the Path of Allah (shall) have a severe torment, because they forgot the Day of reckoning.

(27) This it is what you (Al-Muttaqun - the pious - see V.2:2) are promised for the Day of reckoning!

(28) Say (O Muhammad صلى الله عليه وسلم): "O My slaves who believe (in the Oneness of Allah - Islamic Monotheism), be afraid of your Lord (Allah) and keep your duty to Him. Good is (the reward) for those who do good in this world, and Allah's earth is spacious (so if you cannot worship Allah at a place, then go to another)! Only those who are patient shall receive their reward in full, without reckoning. "

(29) And those who did wrong (the polytheists and disbelievers in the Oneness of Allah), if they had all that is in earth and therewith as much again, they verily, would offer it to ransom themselves therewith on the Day of Resurrection from the evil torment; and there will become apparent to them from Allah what they had not been reckoning.

(30) This Day shall every person be recompensed for what he earned. This Day no injustice (shall be done to anybody). Truly, Allah is Swift in reckoning.