Designing for Healthcare website, what do you guys think its the limit of clinic cards to show for each page?

So, I am working on a clinic search website where people can look for the clinics/hospitals to book the treatments they need. I was wondering how many clinic cards would be best to show per page. Currently I decided to go for 10 each page. They are not too big -420x550- and so,I am trying to find best solution for both SEO purposes -page speed and keywords- but also in terms of bouncing rate. Is there and guidelines I could also refer to -maybe from ecommerce websites or in general?.

Thank you so much.

P.S: I attached an actual picture of a clinic card from ANOTHER website so that it would be clear what I'm talking about.