If you were wondering what the spawn rare for the different Geeks and how many you are allowed in your town at once, find out below:
The Blue Geeks
Spawn Rate: 3 x every 15 mins
Maximum amount: 12 Blue Geeks
The Red Geeks
Spawn Rate: 2 x every 4 hours
Maximum amount: 6 Red Geeks
The Yellow Geeks
Spawn Rate: 2 x every 6 hours
Maximum amount: 4 Yellow Geeks
Are you experiencing different spawn rates?
FamilyGuyTips 
Never had more than 6 yellow in a day spawn, so they are not 6 hours, they seem closer to 8 hours. I get about 12 reds a day so that seems right. Blues are spawning more than every 15 minutes, I just now had 9 spawn in less than a 20 minute period, so their timer is off.
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Just had 6 Gold/Yellow Geeks spawn in the span of 10 minutes of rebuilding the Q Hotel.
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