In the article, I guess this would be buried in
> Students also frequently used Claude to provide technical explanations or solutions for academic assignments (33.5%)—working with AI to debug and fix errors in coding assignments, implement programming algorithms and data structures, and explain or solve mathematical problems.
"Write my essay" would be considered a "solution for academic assignment," but by only referring to it obliquely in that paragraph they don't really tell us the prevalence of it.
(I also wonder if students are smart, and may keep outright usage of LLMs to complete assignments on a separate, non-university account, not trusting that Anthropic will keep their conversations private from the university if asked.)