Hey ATV, welcome to the zoo! Remember to provide pics if you can. Also remember to "Like" if anyone gives you useful and timely advice.
I had a situation like this quite recently with an aged woman's house ... her toilet was cycling about every 10 minutes for months! Believe it or not, your water is going into the main bowl at a very slow rate then down the drain. As the water leaves, it drains the toilet tank until the float activates the refill. You should remove the water tank and rebuild the toilet flush valve seat and/or replace the flush mechanism. It is easy because you only have a few parts and they are simple enough to install.
Parts are readily a available at Home Depot and not expensive. GO FOR IT!