График частотности: криса

[{"date": "2015-06-17", "qty": 3}, {"date": "2019-01-03", "qty": 11}, {"date": "2019-01-04", "qty": 8}, {"date": "2019-01-05", "qty": 5}, {"date": "2019-01-06", "qty": 3}, {"date": "2019-01-07", "qty": 3}]