Oh ok! I was talking more about specific features of terrain.
Imagine you want to travel to some Stronghold ahead, two days of travel through Wilderness. As I understood, we roll on the Map table for 2 maps (Day Scale) to go through before reaching the Stronghold. During the travel, we know it is wilderness, how often do you roll for features or environment on the "Wilderness Table" (page 46). Each point ? Or Each day ?
I don't know if I'm really clear here sorry ! :')