The word(s) "seen" appears 107 time(s) in 96 verse(s) in Quran in Mohsin Khan translation.

(41) And you might have seen the sun, when it rose, declining to the right from their Cave, and when it set, turning away from them to the left, while they lay in the midst of the Cave. That is (one) of the Ayat (proofs, evidence, signs) of Allah. He whom Allah guides, he is the rightly guided; but he whom He sends astray, for him you will find no Wali (guiding friend) to lead him (to the right Path).

(42) (Some) say they were three, the dog being the fourth among them; and (others) say they were five, the dog being the sixth, - guessing at the unseen; (yet others) say they were seven, and the dog being the eighth. Say (O Muhammad صلى الله عليه وسلم): "My Lord knows best their number; none knows them but a few." So debate not (about their number) except with the clear proof (which We have revealed to you). And consult not any of them (people of the Scripture - Jews and Christians) about (the affair of) the people of the Cave.

(43) Say: "Allah knows best how long they stayed. With Him is (the knowledge of) the Unseen of the heavens and the earth. How clearly He sees, and hears (everything)! They have no Wali (Helper, Disposer of affairs, Protector) other than Him, and He makes none to share in His Decision and His Rule."

(44) (They will enter) 'Adn (Eden) Paradise (everlasting Gardens), which the Most Gracious (Allah) has promised to His slaves in the Unseen: Verily His Promise must come to pass.

(45) Have you seen him who disbelieved in Our Ayat (this Qur'an and Muhammad صلى الله عليه وسلم) and said: "I shall certainly be given wealth and children [if I will be alive (again)]."

(46) Has he known the Unseen or has he taken a covenant from the Most Gracious (Allah)?

(47) When he saw a fire, he said to his family: "Wait! Verily, I have seen a fire; perhaps I can bring you some burning brand therefrom, or find some guidance at the fire."

(48) All-Knower of the unseen and the seen! Exalted be He over all that they associate as partners to Him!

(49) Have you (O Muhammad صلى الله عليه وسلم) seen him who has taken as his ilah (god) his own vain desire? Would you then be a Wakil (a disposer of his affairs or a watcher) over him?

(50) 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).