Not a stupid question at all - I tend to think of a "cartwheel" as being the massive copper issues of 1797. The 1806 in the OP is quite a bit smaller. But the term is a loose one and could probably be applied to any large coin as a kind of numismatic slang (for instance, Morgan/Peace silver dollars are called "cartwheels" sometimes as well). They are all pretty large coins: 1797 penny and penny and twopence: https://en.numista.com/catalogue/pieces947.html https://en.numista.com/catalogue/pieces1287.html 1806 penny: https://en.numista.com/catalogue/pieces12981.html
Love the Queen Ann Crown. I have a lot of cartwheels and others in my collection but not one like that. Impressive and beautiful. Bruce