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

(21) Say (O Muhammad صلى الله عليه وسلم) whoever is in error, the Most Gracious (Allah) will extend (the rope) to him, until, when they see that which they were promised, either the torment or the hour, they will come to know who is worst in position, and who is weaker in forces. [This is the answer to the question in Verse No.19:73]

(22) "Verily, the hour is coming - and I am almost hiding it from Myself - that every person may be rewarded for that which he strives.

(23) So bear patiently (O Muhammad صلى الله عليه وسلم) what they say, and glorify the praises of your Lord before the rising of the sun, and before its setting, and during some hours of the night, and at the ends of the day (an indication for the five compulsory congregational prayers), that you may become pleased (with the reward which Allah shall give you).

(24) Those who fear their Lord without seeing Him, and they are afraid of the hour.

(25) O mankind! Fear your Lord and be dutiful to Him! Verily, the earthquake of the hour (of Judgement) is a terrible thing.

(26) And surely, the hour is coming, there is no doubt about it; and certainly, Allah will resurrect those who are in the graves.

(27) And those who disbelieved will not cease to be in doubt about it (this Qur'an) until the hour comes suddenly upon them, or there comes to them the torment of the Day after which there will be no night (i.e. the Day of Resurrection).

(28) And those who strictly guard their (five compulsory congregational) Salawat (prayers) (at their fixed stated hours).

(29) Nay, they deny the hour (the Day of Resurrection), and for those who deny the hour, We have prepared a flaming Fire (i.e. Hell).

(30) "He indeed led me astray from the Reminder (this Qur'an) after it had come to me. And Shaitan (Satan) is to man ever a deserter in the hour of need." [Tafsir Al-Qurtubi]