How often do letting agencies usually inspect properties?

We’ve been dealing with a string of issues with our rental properties. Some of the problems are just normal wear and tear, but others are clearly the result of tenant negligence or even outright damage.

I feel that some of this could have been prevented if the letting agency had carried out regular inspections. Our agreement with them states they’ll do “periodic inspections,” but when I asked what that meant, they said once every 12 months.

Is that standard for these kinds of agreements?

Thanks in advance!