Recently, I started re-reading Absolute Choice, and nearly 600 chapters later, Shi Xiaobai still hasn't broken past the first major realm, the Psionic Mortal Realm. To my knowledge, this is the longest it has taken for a character to break through one realm. In the novel, it's been less than two months, but for the main character to not have a major breakthrough in 600 chapters seems unnatural. I've even read novels where the MC has a crippled cultivation at the start, and even then they've usually broken through 2 or 3 realms by this point. However, I'm curious to see if there are any other novels where it takes this long for the main character to break through one realm, especially at the beginning where you don't need many cultivation resources or requirements like insight into the dao or need to carve a unique path.