type runtime/trace.frequency

5 uses

	runtime/trace (current package)
		flightrecorder.go#L33: 	freq   frequency // timestamp conversion factor, from the runtime
		flightrecorder.go#L75: 	fr.freq = frequency(1.0 / (float64(runtime_traceClockUnitsPerSecond()) / 1e9))
		recorder.go#L105: func traceTimeNow(freq frequency) eventTime {
		recorder.go#L113: type frequency float64
		recorder.go#L116: func (f frequency) mul(t timestamp) eventTime {