They could be used outside of combat too. That mighty leap and scrambling climb even though level 2 come in handyThe term ‘encounter’ is a normal 5e term. By itself, it refers to anything the adventuring party meets.
But the term ‘combat encounter’ specifically refers to ‘a clash between two sides’, organizing into a ‘cycle of rounds and turns’ that begins ‘when everyone rolls initiative’ (PH 189).
So, it seems appropriate to refer to these powers as ‘per combat encounter’, abbreviated ‘• combat’:
To be honest I was playing the lets popup the verisimilitude angle with this we could call them per encounter.
Martial Tricks this cannot be applied to anyone who has seen it recently (z-man came up with better [FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]verbiage[/FONT] for it)
Druids or Environment Straining casters your magics require a scene change to refresh.
Clerics/Warlocks you require a short 1 minute re-tainting or purification ritual to clear your spirit (a potion might allow this once in a while for a cost)
Paladins recover by defeating bad guys after every fight because you are serving your god that way