How to add second Description for coupon category page?

Hi,
At my earlier thread, I have added second description for Store page at here https://www.premiumpress.com/forums/topic/how-to-add-second-store-description-text-area-for-store-page/

Now I tried to add second description for coupon category page by add the code to the bottom of the file content-listing-coupon.php, but the output text display at bottom of every single coupon.

Please see here: https://free.makemoneyonline.tech/listing-category/coupons/

How to display output at the bottom of coupon category page one time only, like the store page? See here: https://free.makemoneyonline.tech/store/godaddy-coupons/

Thanks for your help