How to add latency details in our shopify store

Hi, we actually have a website in shopify domain and we just want to add some additional shipping info which is We just want to Show the latency details to some of our products which are in us,uae & uk warehouse, in which we want to show the Dispatch time in the product page and also in the checkout page. so kindly let us know about this, whether custom code is required for this or else it can be done in another way.We are also providing reference for the clear details (edited by moderator)