График частотности: эшелон

[{"date": "2018-08-28", "qty": 9}, {"date": "2023-08-17", "qty": 3}, {"date": "2024-03-14", "qty": 4}, {"date": "2024-05-04", "qty": 4}, {"date": "2024-09-15", "qty": 3}, {"date": "2024-11-03", "qty": 3}]