Well yeah CSO is not an ontology but a thesaurus.
Here's an idea: compare it to Microsoft Academic Graph's "Fields of Science".
Also, you need to include some actual papers in your study, indexed with the two, and assess the accuracy/adequacy of indexing with the two topic thesauri.
Neither WoS nor Scopus nor Google Scholar offer such data openly, not even with the usual licensed, university-mediated access.
However, there is a good and open alternative: OpenCitations' COCI-dataset.
In addition to the dataset provided by vonjd, you can look at the Online retail and Online retail II datasets on the UC irvine data repository.
They contain transaction data for an online retailer that can be used to derive the Recency, Frequency ...