A secondary city often follows after a primate city and can be seen in the urban hierarchy. Secondary cities  have between “500,000 to 3 million inhabitants, but are often unknown outside of their national or regional context. Many secondary cities in the Global South are expected to undergo massive expansions in the next few decades, comparable to city growth in Europe and North America over the past two centuries.Alfredo Brillembourg & Hubert Klumpner, "Gran Horizonte: Taking a Walk in the Urban Planet", Network City and Landscape. Accessed September 14, 2014
A secondary city often follows after a primate city and can be seen in the urban hierarchy. Secondary cities often have between “500,000 to 3 million inhabitants, but are frequently unknown outside of their national or regional context. Many secondary cities in the Global South are expected to undergo massive expansions in the next few decades, comparable to city growth in Europe and North America over the past two centuries.Alfredo Brillembourg & Hubert Klumpner, "Gran Horizonte: Taking a Walk in the Urban Planet", Network City and Landscape. Accessed September 14, 2014
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often
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frequently