I am not sure if I get you right, but have you looked at the Organization Summary Report?
There you can:
- Restrict to a time range
- select a network
- select an SSID
And there you see the Clients per day:
![KarstenI_0-1599120204155.jpeg KarstenI_0-1599120204155.jpeg](https://community.meraki.com/t5/image/serverpage/image-id/14834i3B7803F85ABBC667/image-size/medium?v=v2&px=400)
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