График частотности: гуте

[{"date": "2018-02-26", "qty": 22}, {"date": "2018-02-27", "qty": 3}, {"date": "2018-03-04", "qty": 11}, {"date": "2018-03-15", "qty": 3}, {"date": "2018-03-18", "qty": 3}, {"date": "2018-04-17", "qty": 3}]