Much more difficult to prove church attendance than employment at McDonalds
Maybe not so difficult, if she was a member and active.
Someone searching for my church attendance would find records for my baptism, confirmation, and marriage, our children’s baptisms and confirmations, as well as mention in reports of my service on altar guild, ladies’ guild, and the nursery and children’s choir boards. Our daughter sang in the choir and our son was an acolyte, so they were often mentioned in Sunday bulletins and monthly parish newsletters.