  Classical soft photon and soft graviton theorems determine long wavelength
electromagnetic and gravitational waveforms for a general classical scattering
process in terms of the electric charges and asymptotic momenta of the ingoing
and outgoing macroscopic objects. Performing Fourier transformation of the
electromagnetic and gravitational waveforms in the frequency variable one finds
electromagnetic and gravitational waveforms at late and early retarded time.
Here extending the formalism developed in \cite{1912.06413}, we derive
sub-subleading electromagnetic and gravitational waveforms which behave like
$u^{-2}(\ln u)$ at early and late retarded time $u$ in four spacetime
dimensions. We also have derived the sub-subleading soft photon theorem
analyzing two loop amplitudes in scalar QED. Finally, we give the structure of
leading non-analytic contribution to (sub)$^{n}$-leading classical soft photon
and graviton theorems which behave like $u^{-n}(\ln u)^{n-1}$ for early and
late retarded time $u$.
