kilogram - mass, second - ?

TIME

Word	Clue
BRNO	second largest city of Czech Republic
ORAN	second largest city of Algeria
GRAZ	second largest city of Austria
SPLIT	second largest city of Croatia
BATUMI	second largest city of Georgia
AARHUS	second largest city of Denmark
PLOVDIV	second largest city of Bulgaria
MUYINGA	second largest city of Burundi
BEIJING	second largest city of China
ABIDJAN	second largest city of Côte d'Ivoire
HAMBURG	second largest city of Germany
ANTWERP	second largest city of Belgium
MONTREAL	second largest city of Canada
LIMASSOL	second largest city of Cyprus
KANDAHAR	second largest city of Afghanistan
DEBRECEN	second largest city of Hungary
SURABAYA	second largest city of Indonesia
MELBOURNE	second largest city of Australia
ALEXANDRIA	second largest city of Egypt
THESSALONIKI	second largest city of Greece
INCH	kilogram - pound, centemetre - ?
DISTANCE	kilogram - mass, meter - ?