Are they evenly distributed? I'm in lake view chicago and there are 5 in a 15 minute walk they just happen to be like all 15 minutes as I'm like right in the m

Are they evenly distributed? I'm in lake view chicago and there are 5 in a 15 minute walk they just happen to be like all 15 minutes as I'm like right in the middle of all them. There are clusters though where you could go to any of 5 different grocery stores within a 5 minute walk.