How often can I allow myself a treat? No health issues, love my chocolate or nuts daily

Every day-moderation. There is no need to limit nuts, as they are among the healthiest of foods, though raw unsalted nuts may be healthier than salted roasted nuts. Almonds & walnuts are especially healthy. Chocolate is actually good for you if it is dark chocolate with at least 70% cocoa solids- probably up to 2 ounces a day. If sweeter chocolates then consume less. If a food gives you joy then enjoy it in moderation.