How do i add relationship count in REST API calls?

Discord Q&A strapi-questions
5

but
{{baseURL}}/specialities/1?populate=clinicians
just returning

{
    "data": {
        "id": 1,
        "attributes": {
            "speciality": "Psychiatrist",
            "createdAt": "2024-03-20T07:16:40.146Z",
            "updatedAt": "2024-03-20T11:36:25.587Z"
        }
    },
    "meta": {}
}

without any clinicians informations