График частотности: legacy

[{"date": "2012-04-09", "qty": 3}, {"date": "2014-01-31", "qty": 3}, {"date": "2014-02-01", "qty": 3}, {"date": "2014-02-02", "qty": 3}, {"date": "2023-08-24", "qty": 7}, {"date": "2023-08-26", "qty": 10}]