Hobbit on Quest (he/him)
That depends on what you're looking for information on. If you're just collecting data and seeing what comes out, that may tell you something about how people play. But if people approach one-shots and campaigns differently, just looking at how many sessions people play is not going to spot it - not without defining the approaches differently and seeking that data.But picking X because you feel it is right is crummy statistics and research.
We shouldn't assign what a campaign is. We should look at the data, and discover what it is.
For example, I would not include sessions intended to be one-shots as campaigns.