{"aspect_id":"AS153","aspect_name":"frequency-ratio","aspect_reference":null,"aspect_symbol":null,"name":"frequency-ratio hertz per hertz","scale_id":"SC1750","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"None Hz.Hz-1","unit_id":"UN1663","unit_name":"hertz per hertz","unit_reference":null,"unit_symbol":"Hz.Hz-1"}