get system frequency in rust

main.rs
use std::time::{SystemTime, UNIX_EPOCH};

fn main() {
    let start = SystemTime::now();
    let now = SystemTime::now();
    
    let duration = now.duration_since(start).unwrap();
    let elapsed = duration.as_secs_f64();
    
    let frequency = 1.0 / elapsed;
    
    println!("System frequency: {:.2} Hz", frequency);
}
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