"Geographical spread" refers to the distribution or range of something across different locations or regions. It describes how something is spread out or dispersed across a specific area on the earth's surface. Full definition
We were also interested in having a good geographical spread in the show. (sleek-mag.com)
Third, there is currently a wide geographical spread between prices for crude. (canadianbusiness.com)
But the epidemic is far from over: the risk of flare ups and further geographical spread will remain until there are no new cases. (scientificamerican.com)