How often does Adobe update its lens profiles?

Check your Creative Cloud desktop app for a Camera Raw update. Adobe Camera Raw 16.4 was just released this week, like a few days ago, and the current Supported Lenses list seems to contain the lens you asked about:

To answer your general question, there is not a specific release schedule, although you could work out an average from past release dates. Very roughly, there is a new update every few months.

When the updates come is not just triggered by new lens profiles. Over time new lenses, new cameras, new features, and bug fixes all pile up, and they decide it’s time to do an update when those all accumulate enough to make it worth building an update.