For example, you could count:
* Main roles: These would include shows like "Veronica Mars", "House of Lies", "The Good Place", and "Central Park".
* Recurring roles: These would include shows like "Gossip Girl", "Party Down", and "Frozen II".
* Guest appearances: These would be far more numerous and include shows like "Friends", "Entourage", and "American Dad!".
To get a more accurate count, you could look at her filmography on sites like IMDb. However, even then, it depends on how you define "starring."