Magento 2 Checkout payment method Add subtitles

In our Magento 2.3 Store I would like to add a subtitle to the payment method in the cash register.

Currently only the title of the payment method is displayed. Now I would like to add a subtitle to each payment method to indicate whether the payment method is free or paid.

How can I change this?

I have already checked the template:

/vendor/magento/module-checkout/view/frontend/web/template/payment-methods/list.html

However, the payment type title will not be loaded there.