Has the word "death" (الموت) been mentioned in the Qur’an, and is it permissible to recite Surat Ad-Dukhan every Friday night (from after the Maghrib call to prayer on Thursday until the Maghrib call to prayer on Friday)?

The word "death" is mentioned more than seventy times in the Quran, including Allah's saying: "Wherever you may be, death will overtake you, even if you should be within towers of lofty construction," and His saying: "Say, 'Indeed, the death from which you flee — it will surely meet you; then you will be returned to the Knower of the unseen and the seen, and He will inform you about what you used to do.'" There is no harm in repeatedly reciting a specific Surah for memorization, but specifying a particular time for its recitation and repetition has not been authentically reported from the Prophet (peace be upon him), so it should be avoided. Virtues have been mentioned regarding Surat Ad-Dukhan, but they are not without weakness, and none of them include what the questioner mentioned.