Occupation rate Airtable

Hello guys, rookie there with a little issue…

Currentlly I’m signing new customer using minExtension that is directly connected to my ‘Customer’ base. I have another base ‘Planning’ with a table ‘Time of coaching’ that displays for each teachers the time they spent coaching the customers.

Is there a way to display the occupancy rate when I’m signing new customer ?
I was thinking about showing the occupancy rate of each teacher on minExtension but I don’t think it’s possible (ex. on screenshot).

Thanks for the help