I think Brad and Tim (cc-ed) took a look at that while working on the Lua migration, though I'm not sure how cross-wiki their study was.

On Sun, Jun 23, 2013 at 8:52 AM, Yury Katkov <katkov.juriy@gmail.com> wrote:
Hi everyone!

Has anyone tried to observer how different wikipedias use the
templates: how often, what's the average depth of template calls, etc?
Yury Katkov, WikiVote

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