code: public double getAverageWindowLoadTime(final String intervalName, final TimeUnit unit) {
  		return unit.transformMillis(totalWindowLoadTime.getValueAsLong(intervalName)) / numberOfLoads.getValueAsDouble(intervalName);
  	}
docs: Returns the average web page load time for given interval and {@link TimeUnit}.
  
  @param intervalName name of the interval
  @param unit         {@link TimeUnit}
  @return average web page load time