altered stool frequency (>3 times a day or <3 times a week)

This is because they have exhausted their nervous system to such an extent that their nerve cells operate at an abnormal frequency.

The connection between physical inactivity and the risk of coronary heart disease has been observed in numerous countries and population groups.

A clock switching unit selects an input clock other than the clock with the abnormal frequency on the basis of the clock switching signal, and delivers the input clock thus selected to the system as the system clock.