Into a sauce pan add your vinegar, water, sugar, salt, peppercorns, and oregano. Place on a stove over low heat until comes up to a simmer to dissolve the salt and sugar.
2 cups white wine vinegar, 2 cups water, 2 tbsp sugar, 1 tbsp kosher salt, 1 tbsp black peppercorns, 1 tbsp dried oregano