Well, I'll be refreshing it on a point-per-point as described on p. 74 but we need to agree on what refreshes it completely. A few options would be...
1. Every time an adventure finishes completely.
2. Every in-game day.
3. Every in-game week.
4. Every time a major adventure component is completed.
Any thoughts? It would usually be "every session" which would probably amount to every few hours in game, but I'm not sure.