'Extensively' in the Bible

I have traveled extensively and have been endangered from rivers, robbers, my own people, and gentiles. I've also been in danger in the city, in the open country, at sea, from false brothers,

You have heard of my career and former manner of life in Judaism, how I used to hunt down and persecute the church of God extensively and [with fanatical zeal] tried [my best] to destroy it.