The number of air molecules per \(cm ^3\) increased from \(3 \times 10^{19}\) to \(12 \times 10^{19}\). The ratio of col…

The number of air molecules per \(cm ^3\) increased from \(3 \times 10^{19}\) to \(12 \times 10^{19}\). The ratio of collision frequency of air molecules before and after the increase in number respectively is