Slag wrote,

    The word "Hallelujah" appears in the Bible only four times, all in the Book
    of the Revealtion of John, the Divine

I'm no biblical scholar, but this seems unlikely to me. Psalms 113 through 118 are referred to in the Jewish liturgy as The Hallel, and I think you'll find Hallelujah written several times in those psalms, in the Hebrew if not in the King James.