Private Credit Fund Definition and examples

Hi Chads, There seems to be an interview of Mr. Lee , Carlyle's co-CEO about their expansion into private credit fund. I'm curious about the definition of private credit fund, what they do, etc. 1. Private credit fund vs. private debt fund vs credit debt fund etc. are these all same? 2. Do you know when did named buyout PEs such as Carlyle, KKR, Bain, Blackstone, TPG, Apollo, CVC, etc, started their private credit fund? 3. Their private credit fund AUM? 4. Kinds of investment they do. Real examples if, possible. Major products? 5. And lastly, classification of private credit funds, focusing on investment strategies, mandates, products. Many thanks in advance.