TImeframe for updated packages to become available in 'stable'

Would anyone know how long it generally takes for an updated package to appear in Debian stable (buster)?

I am inquiring about Thunderbird. The current version in the repositories as of right now, is 78.6.0. Since then, Mozilla has released 78.6.1 and now 78.7.0. Both 78.6.1/78.7.0 had/have security fixes included.

Thanks in advance.