Thank you very much for the explanation! It's a pleasure to learn Japanese since I really like the language, and Japanese Culture. ありがとうございます！

Hello. I'm not a qualified professional teacher but I've searched for it and found the answers which I can understand as a native speaker so I'll write them down. *回： You can use 回 with 0, 第, 全. ex) 第１回→OK　第１度→NG　 　 0回→OK 0度→NG ( you can say 0度 if you are talking about temperature or angle but not when counting numbers) You can use 回 when... ・you can see the beginning and end of it clearly. ex) episodes of stories, number of classes or events ・you can predict next time regularly. ex) 今回( this time )→ OK 次回 ( next time ) →OK *度： You can use it when... you can see the beginning and end of it but not clearly.( it can be changed by how much one is putting the value on ) ex) 一度にいろいろ話す( talk about several things all at once) 、この度はありがとうございました( thank you for this time * today )、今度 ( at some point which would come as next time )→OK 次度→NG Thank you for leaning Japanese! I hope it can help you a bit. べんきょう、がんばってください！