The word(s) "afternoon" appears 19 time(s) in 19 verse(s) in Quran in Mohsin Khan translation.

(11) Have you not seen how your Lord spread the shadow. If He willed, He could have made it still - But We have made the sun its guide (i.e. after the sunrise, the shadow shrinks and vanishes at midnoon and then again appears in the afternoon with the decline of the sun, and had there been no sunlight, there would have been no shadow).

(12) And His are all the praises and thanks in the heavens and the earth; and (glorify Him) in the afternoon (i.e. offer 'Asr prayer) and when you come up to the time, when the day begins to decline (i.e. offer Zuhr prayer). (Ibn 'Abbas said: "These are the five compulsory congregational prayers mentioned in the Qur'an)." [Tafsir At-Tabari]

(13) And glorify His Praises morning and afternoon [the early morning (Fajr) and 'Asr prayers].

(14) And to Solomon (We subjected) the wind, its morning (stride from sunrise till midnoon) was a month's (journey), and its afternoon (stride from the midday decline of the sun to sunset) was a month's (journey i.e. in one day he could travel two months' (journey). And We caused a fount of (molten) brass to flow for him, and there were jinn that worked in front of him, by the Leave of his Lord. And whosoever of them turned aside from Our Command, We shall cause him to taste of the torment of the blazing Fire.

(15) When there were displayed before him, in the afternoon, well trained horses of the highest breed [for Jihad (holy fighting in Allah's Cause)].

(16) The Fire, they are exposed to it, morning and afternoon. And on the Day when the Hour will be established (it will be said to the angels): "Cause Fir'aun's (Pharaoh) people to enter the severest torment!"

(17) In order that you (O mankind) may believe in Allah and His Messenger (صلى الله عليه وسلم), and that you assist and honour him (صلى الله عليه وسلم), and (that you) glorify (Allah's) praises morning and afternoon.

(18) And remember the Name of your Lord every morning and afternoon [i.e. offering of the Morning (Fajr), Zuhr, and 'Asr prayers].

(19) The Day they see it, (it will be) as if they had not tarried (in this world) except an afternoon or a morning.