Intherealmoftimekeeping,Radio-ControlledClocks(RCC)standsdistinctfromthequartzclocks.Eventhemostexpensivequartzclocksmaydeviatebyatleastonesecondeachday.Overtime,thisdiscrepancyaccumulates,resultinginaone-minuteerrorwithintwomonthsandasix-minuteerror