Cross section measurement of $e^{+}{e}^{-}\to f_1(1285){\pi }^{+}{\pi }^{-}$ at center-of-mass energies between $3.808$ and $4.951\mathrm{G}\mathrm{e}\mathrm{V}$

Using data samples collected by the \mbox{BESIII} detector located at the Beijing Electron Positron Collider, the cross sections of the process $e^{+}{e}^{-}\to f_1(1285){\pi }^{+}{\pi }^{-}$ are measured at forty-five center-of-mass energies from $3.808$ to $4.951\mathrm{G}\mathrm{e}\mathrm{V}$. An investigation on the cross section line shape is performed, and no significant structure is observed.