The word(s) "hour" appears 77 time(s) in 63 verse(s) in Quran in Mohsin Khan translation.

(11) Say (O Muhammad صلى الله عليه وسلم): "I have no power over any harm or profit to myself except what Allah may will. For every Ummah (a community or a nation), there is a term appointed; when their term comes, neither can they delay it nor can they advance it an hour (or a moment)." (Tafsir Al-Qurtubi).

(12) And they ask you (O Muhammad صلى الله عليه وسلم) to inform them (saying): "Is it true (i.e. the torment and the establishment of the hour - the Day of Resurrection)?" Say: "Yes! By my Lord! It is the very truth! and you cannot escape it!"

(13) And perform As-Salat (Iqamat-as-Salat ), at the two ends of the day and in some hours of the night [i.e. the five compulsory Salat (prayers)]. Verily, the good deeds remove the evil deeds (i.e. small sins). That is a reminder (an advice) for the mindful (those who accept advice).

(14) Do they then feel secure from the coming against them of the covering veil of the Torment of Allah, or of the coming against them of the (Final) hour, all of a sudden while they perceive not?

(15) And We created not the heavens and the earth and all that is between them except with truth, and the hour is surely coming, so overlook (O Muhammad صلى الله عليه و سلم) their faults with gracious forgiveness. [This was before the ordainment of Jihad - holy fighting in Allah's cause].

(16) The Event (the hour or the punishment of disbelievers and polytheists or the Islamic laws or commandments) ordained by Allah will come to pass, so seek not to hasten it. Glorified and Exalted be He above all that they associate as partners with Him.

(17) And if Allah were to seize mankind for their wrong-doing, He would not leave on it (the earth) a single moving (living) creature, but He postpones them for an appointed term and when their term comes, neither can they delay nor can they advance it an hour (or a moment).

(18) And to Allah belongs the Unseen of the heavens and the earth. And the matter of the hour is not but as a twinkling of the eye, or even nearer. Truly! Allah is Able to do all things.

(19) And thus We made their case known (to the people), that they might know that the Promise of Allah is true, and that there can be no doubt about the hour. (Remember) when they (the people of the city) disputed among themselves about their case, they said: "Construct a building over them; their Lord knows best about them;" (then) those who won their point said (most probably the disbelievers): "We verily shall build a place of worship over them."

(20) "And I think not the hour will ever come, and if indeed I am brought back to my Lord, (on the Day of Resurrection), I surely shall find better than this when I return to Him."