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

(31) Musa (Moses) said: "Verily I seek refuge in my Lord and your Lord from every arrogant who believes not in the Day of reckoning!"

(32) And We have assigned for them (devils) intimate companions (in this world), who have made fair-seeming to them, what was before them (evil deeds which they were doing in the present worldly life and disbelief in the reckoning and the Resurrection) and what was behind them (denial of the matters in the coming life of the Hereafter as regards punishment or reward). And the Word (i.e. the torment) is justified against them as it was justified against those who were among the previous generations of jinn and men that had passed away before them. Indeed they (all) were the losers.

(33) The sun and the moon run on their fixed courses (exactly) calculated with measured out stages for each (for reckoning).

(34) Then why do you not - if you are exempt from the reckoning and recompense (punishment) -

(35) Nay! Man (denies Resurrection and reckoning. So he) desires to continue committing sins.

(36) For verily, they used not to look for a reckoning.

(37) Do they not think that they will be resurrected (for reckoning),

(38) He surely will receive an easy reckoning,

(39) Then verily, for Us will be their reckoning.