Which means exactly "zero."
God did not quicken a man named Saul 400 years later to preach the Gospel of Christianity.
Christianity spread like a ripple from a stone thrown into a pond -- outward from the source.
Not 400 years later.
But from God's perspective, that's the blink of an eye. Less than a day.
As I said in post #257, I do not disagree with you on this point at all. I was only responding about neither Paul nor (presumably, but we don't actually know for certain) Luke being followers of Christ prior to the Resurrection.
I have no idea how anyone would think that Paul and Luke were writing and evangelizing four hundred years after the Resurrection. We are in no disagreement here. Everything I have ever seen puts Paul's conversion a few years after the Resurrection (and Catholic, Orthodox and other traditions celebrate the date of the Road to Damascus Conversion as being today, January 25th), Luke's conversion is never discussed but he was obviously a Christian early enough to travel with Paul. As I said, these are historical facts, confirmed by scripture and tradition, I am unaware of any scholarly disagreement over them. Four hundred years after the Pentecost, Christianity was the dominant religion of much of the Mediterranean region -- the Gospel had already spread.