The word(s) "number" appears 21 time(s) in 19 verse(s) in Quran in Muhammad Pickthal translation.

(11) He it is Who appointed the sun a splendour and the moon a light, and measured for her stages, that ye might know the number of the years, and the reckoning. Allah created not (all) that save in truth. He detaileth the revelations for people who have knowledge.

(12) And they sold him for a low price, a number of silver coins; and they attached no value to him.

(13) Then We sealed up their hearing in the Cave for a number of years.

(14) (Some) will say: They were three, their dog the fourth, and (some) say: Five, their dog the sixth, guessing at random; and (some) say: Seven, and their dog the eighth. Say (O Muhammad): My Lord is Best Aware of their number. None knoweth them save a few. So contend not concerning them except with an outward contending, and ask not any of them to pronounce concerning them.

(15) So make no haste against them (O Muhammad). We do but number unto them a sum (of days).

(16) Verily He knoweth them and numbereth them with (right) numbering.

(17) Then I fled from you when I feared you, and my Lord vouchsafed me a command and appointed me (of the number) of those sent (by Him).

(18) And (Solomon) smiled, laughing at her speech, and said: My Lord, arouse me to be thankful for Thy favour wherewith Thou hast favoured me and my parents, and to do good that shall be pleasing unto Thee, and include me in (the number of) Thy righteous slaves.

(19) We have appointed only angels to be wardens of the Fire, and their number have We made to be a stumbling-block for those who disbelieve; that those to whom the Scripture hath been given may have certainty, and that believers may increase in faith; and that those to whom the Scripture hath been given and believers may not doubt; and that those in whose hearts there is disease, and disbelievers, may say: What meaneth Allah by this similitude? Thus Allah sendeth astray whom He will, and whom He will He guideth. None knoweth the hosts of thy Lord save Him. This is naught else than a Reminder unto mortals.