Such raids will also happen annually. Why not? They led to large chunk of most fertile lands of Eurasia[1] ( not having any permanent population way into the second millenium. They absolutely treat peasants as a resource and they will over-hunt it.

If you live under the defense of forest, you can still settle there and lose 1-3% of population every decade or so because you're good at hiding. If you are trying to live in the steppe, you will be over-raided and scattered.

1. https://en.wikipedia.org/wiki/Chernozem