Precession frequency of asteroids at different distances from the star calculated from linear secular theory in the dynamical system including Jupiter and Saturn. The gas giants are initially as in the JSREG simulation. The ﹩{\nu }_{6}﹩ and ﹩{\nu }_{16}﹩ locations in the JSREG simulation corresponds to the intersection between the A curve and the g₆ and s₆ frequencies, respectively. Frequencies corresponding to 10⁻⁵ to 10⁻⁴ yr⁻¹ are shown to estimate how much ﹩{\nu }_{6}﹩ jumps across the belt in the JSCHA simulation.