Number of Miners

Hello,

I am conducting a research on various blockchains. I would like to learn how many miners or (is it called nodes) securing the Stacks chain?

I checked onstacks app and it only shows 5 active miners for last 100 blocks. How can i get let say active miners number for 1 month?

There is also a “Miners” tab onstack app and it shows around 100 miner address. Can i assume that is the total active miners?

Thanks
Evrim