График частотности: отношений

[{"date": "2020-06-19", "qty": 3}, {"date": "2020-07-17", "qty": 3}, {"date": "2020-09-02", "qty": 3}, {"date": "2020-09-15", "qty": 4}, {"date": "2021-01-17", "qty": 6}, {"date": "2021-02-02", "qty": 3}, {"date": "2021-02-06", "qty": 3}, {"date": "2021-02-08", "qty": 4}, {"date": "2021-02-12", "qty": 3}, {"date": "2021-02-13", "qty": 3}, {"date": "2021-02-15", "qty": 6}, {"date": "2021-02-19", "qty": 4}, {"date": "2021-02-20", "qty": 4}, {"date": "2021-02-21", "qty": 4}, {"date": "2021-02-23", "qty": 3}, {"date": "2021-03-07", "qty": 3}, {"date": "2021-03-28", "qty": 4}, {"date": "2021-05-03", "qty": 4}, {"date": "2021-06-07", "qty": 3}, {"date": "2021-07-07", "qty": 3}, {"date": "2022-02-01", "qty": 4}, {"date": "2022-04-02", "qty": 6}, {"date": "2022-10-13", "qty": 3}, {"date": "2022-10-31", "qty": 3}, {"date": "2022-11-13", "qty": 3}, {"date": "2023-06-02", "qty": 3}, {"date": "2023-06-16", "qty": 5}, {"date": "2023-06-17", "qty": 4}, {"date": "2023-06-18", "qty": 4}, {"date": "2023-06-26", "qty": 8}]