A great place to harvest Froglok Meat is the Froglok Slave Pen in Lower Guk, as all five slaves respawn in eight seconds.
The Froglok Slave pen can be found @ LOC: NEG 600, NEG 200 in Lower Guk. It is the first corridor on your left (west) as you exit the "safe hall' heading toward the Ghoul Lord (north).
Edited, Feb 9th 2021 5:51pm by Ebelch