User blog comment:Ecl1psed276/Growth rate of oracle Turing machines/@comment-35470197-20190714085120

> so we could say that it has a growth rate of \(f_{\omega_1^{\textrm{CK}}}\) in the FGH, for a suitable system of fundamental sequences below \(f_{\omega_1^{\textrm{CK}}}\) (Kleene's O may be used to do this).

No way.