The word(s) "number" appears 36 time(s) in 34 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) It is He Who made the sun to be a shining glory and the moon to be a light (of beauty), and measured out stages for her; that ye might know the number of years and the count (of time). Nowise did Allah create this but in truth and righteousness. (Thus) doth He explain His Signs in detail, for those who understand.

(12) Allah doth know what every female (womb) doth bear, by how much the wombs fall short (of their time or number) or do exceed. Every single thing is before His sight, in (due) proportion.

(13) And He giveth you of all that ye ask for. But if ye count the favours of Allah, never will ye be able to number them. Verily, man is given up to injustice and ingratitude.

(14) If ye would count up the favours of Allah, never would ye be able to number them: for Allah is Oft-Forgiving, Most Merciful.

(15) We have made the Night and the Day as two (of Our) Signs: the Sign of the Night have We obscured, while the Sign of the Day We have made to enlighten you; that ye may seek bounty from your Lord, and that ye may know the number and count of the years: all things have We explained in detail.

(16) Then We draw (a veil) over their ears, for a number of years, in the Cave, (so that they heard not):

(17) (Some) say they were three, the dog being the fourth among them; (others) say they were five, the dog being the sixth,- doubtfully guessing at the unknown; (yet others) say they were seven, the dog being the eighth. Say thou: "My Lord knoweth best their number; It is but few that know their (real case)." Enter not, therefore, into controversies concerning them, except on a matter that is clear, nor consult any of them about (the affair of) the Sleepers.

(18) Nor had he numbers to help him against Allah, nor was he able to deliver himself.

(19) So make no haste against them, for We but count out to them a (limited) number (of days).

(20) He does take an account of them (all), and hath numbered them (all) exactly.