**Category:** Mechanics  
**Subtype:** Simple Harmonic Motion (SHM)  
**Problem Description:** Find the frequency of a simple pendulum oscillating according to the given equation.  

**Summary:** The problem involves determining the frequency of a simple harmonic oscillator (a simple pendulum) described by the equation \(s=2 \cos \left(\pi t+\frac{\pi}{3}\right) \mathrm{cm}\). The options provided are different frequency values in Hertz (Hz).