Someone please make me understand the searching trends of zameen.Com

I cant understand how zameen.Com displaying trends in which prescriptive? For example

Gulistan e johar trend % is 6.5 and malir is 3.3 %
But when i go more deep in malir some areas appear inside malir where their search trend is more high like 24% 45% which is higher than johar? Whats the concept i cant understrand. Also make me understand how these trends helps us ?