Google Maps Location Sharing polling frequency

I thought I read somewhere that the Google Maps Location Sharing component pings the API every 3 minutes, but now I can’t find where I read that… so maybe I’m making it up.

In any case, does anybody know what it is? And what I’m looking to do is to increase how often it polls (yes, I’m aware of API key limits etc, I’m a developer).

According to the code, looks like the update period is fixed at 30 seconds.