График частотности: обход

[{"date": "2017-07-14", "qty": 3}, {"date": "2017-08-03", "qty": 7}, {"date": "2017-08-07", "qty": 7}, {"date": "2017-08-11", "qty": 7}, {"date": "2017-08-18", "qty": 3}, {"date": "2017-09-20", "qty": 3}, {"date": "2018-02-27", "qty": 7}, {"date": "2020-01-15", "qty": 3}, {"date": "2021-05-28", "qty": 4}, {"date": "2021-09-04", "qty": 3}, {"date": "2022-08-12", "qty": 3}, {"date": "2022-08-13", "qty": 3}, {"date": "2022-08-14", "qty": 3}, {"date": "2022-12-31", "qty": 7}, {"date": "2023-01-01", "qty": 6}, {"date": "2023-12-11", "qty": 3}, {"date": "2023-12-12", "qty": 3}, {"date": "2023-12-13", "qty": 3}, {"date": "2023-12-14", "qty": 3}, {"date": "2023-12-15", "qty": 4}, {"date": "2023-12-16", "qty": 5}, {"date": "2023-12-17", "qty": 6}, {"date": "2023-12-18", "qty": 4}, {"date": "2023-12-22", "qty": 4}, {"date": "2024-07-16", "qty": 3}, {"date": "2024-07-17", "qty": 3}, {"date": "2024-09-28", "qty": 4}, {"date": "2025-03-15", "qty": 3}, {"date": "2025-03-16", "qty": 3}, {"date": "2026-03-12", "qty": 3}]