edit ` let denominator = Double(times - 1) * Double(duration) / Double(divider) * Double(NSEC_PER_SEC)` to `let denominator = Double(times - 1) * Double(duration) / Double(divider)`
edit
let denominator = Double(times - 1) * Double(duration) / Double(divider) * Double(NSEC_PER_SEC)to
let denominator = Double(times - 1) * Double(duration) / Double(divider)