As an advice. Don't binch watch Frieren. The first 4 episodes were aired at once and can be watched together - they function like an epiloge. And there are other episodes that connect quite well with each other. You have to decide for yourself if you wanna connect them together. Whatever you do it will be your own experience to watch 9+10 or 8+9+10 together. But most of the episodes really need to settle down a bit. So give yourself a day or so in between them at least and if you have the itch to see more because you can not hold it and want to know how it goes forward go for it.