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Just to let you know, that wasn't the original commentor, so it could stil involve scrpaing (which is what I expected, too).

I would guess using Google's Places API. They have busy time reports and hours that are most likely updated by the business owner. No scraping needed

Busy Time is actually not available to the places API. It’s one of the top request features though. There’s a legal/PII dimension to the issue.

Open Hours though are easy to read from the json response.

Not a Googler but I would expect busy hours graph being generated by Android Location Services data.