Frailing is downpicking pickin a melody and using a strum generally downit is not, clawhammer
clawhammer is melody and originally down but instead of a brush, instead of a brush a single harmony note is played, originally this was either drop thumbed ,or in the case of bascam lunsford the string above the melody note was a harmony note plucked upwards.
cklawhammer is different from frailing,
seeger style is up pickin as can be seen from the link