The prophet Isaiah, who lived in the 8th century BCE (around 700 years before the birth of Jesus), made several prophecies about the coming of a future messianic figure. These prophecies can be found in the Book of Isaiah in the Old Testament of the Bible.
The fulfillment of Isaiah's prophecies about Jesus' birth and life occurred when Jesus Christ was born in Bethlehem, as recorded in the New Testament of the Bible. The exact year of Jesus' birth is a matter of debate among scholars, but it is commonly believed to have occurred around 4 to 6 BCE.
So, between the time Isaiah prophesied about Jesus and its fulfillment (Jesus' birth), it was approximately 700 years.