The word(s) "seen" appears 48 time(s) in 47 verse(s) in Quran in Abdullah Yusuf Ali translation.

(41) We sent aforetime our messengers with Clear Signs and sent down with them the Book and the Balance (of Right and Wrong), that men may stand forth in justice; and We sent down Iron, in which is (material for) mighty war, as well as many benefits for mankind, that Allah may test who it is that will help, Unseen, Him and His messengers: For Allah is Full of Strength, Exalted in Might (and able to enforce His Will).

(42) Had We sent down this Qur'an on a mountain, verily, thou wouldst have seen it humble itself and cleave asunder for fear of Allah. Such are the similitudes which We propound to men, that they may reflect.

(43) As for those who fear their Lord unseen, for them is Forgiveness and a great Reward.

(44) Or that the Unseen is in their hands, so that they can write it down?

(45) "He (alone) knows the Unseen, nor does He make any one acquainted with His Mysteries,-

(46) Neither doth he withhold grudgingly a knowledge of the Unseen.

(47) Those who (want but) to be seen (of men),