The word(s) "descent" appears 3 time(s) in 3 verse(s) in Quran in Mohsin Khan translation.

(1) And We said to the Children of Israel after him: "Dwell in the land, then, when the final and the last promise comes near [i.e. the Day of Resurrection or the descent of Christ ['Îsa (Jesus), son of Maryam (Mary) عليهما السلام on the earth], We shall bring you altogether as mixed crowd (gathered out of various nations). (Tafsir Al-Qurtubi,).

(2) And he ['Îsa (Jesus), son of Maryam (Mary)] shall be a known sign for (the coming of) the Hour (Day of Resurrection) [i.e. 'Isa's (Jesus) descent on the earth]. Therefore have no doubt concerning it (i.e. the Day of Resurrection). And follow Me (Allah) (i.e. be obedient to Allah and do what He orders you to do, O mankind)! This is the Straight Path (of Islamic Monotheism, leading to Allah and to His Paradise).

(3) And indeed he (Muhammad صلى الله عليه وسلم) saw him [Jibril (Gabriel)] at a second descent (i.e. another time).