If frogs are coming into your garden they are heading for a breeding pond, and during certain times of the year they will be out and about in numbers. The
spring migration to the pond, a mid-summer exodus of young from the pond, and then in Autumn the return to the pond. Mostly moving during damp rainy nights, just like slugs on their way to
munch your favourite flowers. Frogs eat slugs!
The damp conditions that attract slugs also attract frogs and frogs eat slugs so I can't see
why you should want to stop frogs from coming into your garden at all. However, If the calls are keeping you awake, or if there are frogs getting into your swimming pool, there are two things you
can do.