Frailing is an older style of banjo playing. There are other threads which talk about it but I don't know how to do the blue clicky thing.
Anyway Frailing the banjo has more of a Carter Family guitar sound than the 3 finger scruggs style. Frailing is what Stringbean played as well as Grandpa Jones & Uncle Dave Maykon (how ever you spell his name) It is very similar to the Pete Seeger style except with his your first note is plucked with an upward stroke & frailing is all downward motion.
hope this helps
Charcloth