How to Search past agendas for roles.

I am logged in as Admin. If I try to delete a role I get the message:

"Role "XXXXX" is used on existing agendas and cannot be deleted. Remove it from all templates and meetings first."

Is there a way to search for the role "XXXXXX" across all templates and historical agendas? What's the best practice for this?

I researched the documentation and found nothing. I did not find an admonition that one cannot delete roles that exist in a historical agenda.

https://optimalspeakers.toastmastersclubs.org/clubs/1000000538/agenda-templates/#tab-roles

Thanks,