https://www.thespruceeats.com/diy-hand-rubbed-sage-powder-1761803
Rubbing sage releases the herb's essential oils and turns dried sage into a much more flavorful ingredient. At the same time, the flavor is less concentrated than ground sage, so you'll need to adjust quantities when using rubbed sage as a substitute for ground sage in recipes. Rubbed sage can also replace fresh sage leaves.
Use twice as much rubbed sage when substituting it in a recipe that calls for ground sage.
1 ounce (2 tablespoons) rubbed sage can replace 1 cup of fresh sage
The flavor of rubbed sage intensifies when frozen. Use it sparingly if you are making something like a homemade sausage that will go into the freezer.