Show the price per week or month on each plan
Your subscription widget can now show what each plan costs per week, month or year, so shoppers can tell that 156,00 € every 3 months (52,00 € / month) beats 55,00 € every month.
Turn it on. Open a widget, go to Design → Customize → General and tick Display price per delivery. A line such as "52,00 € / month" appears under each plan's price. Also tick Only show price per delivery to show just the unit price.

Each plan uses its own delivery interval, with its discount and quantity included. Prepaid plans, the one-time purchase option and the sticky add to cart bar don't change. Both settings are off by default.