In the reported figure, two bodies $A$ and $B$ of masses 200 g and 800 g are attached with the system of springs. Springs are kept in a stretched position with some extension when the system is released. The horizontal surface is assumed to be frictionless. The angular frequency will be \_\_\_\_ rad $\mathrm{s}^{-1}$ when $k = 20\mathrm{~N~m}^{-1}$.