However effective freeze-thaw, rain, wind erosion are, they are still not as powerful as mechanical weathering, be that natural sand-blasting or being used as a mill.
This is why carvings (mechanical, quickly made) can survive thousands of years of natural (freeze thaw, rain) erosion.
My thesis is sadly only on paper, I will scan it in one day. I would do it tonight except I have a yoghurt that's about to go out of date and needs eating.