График частотности: брейвика

[{"date": "2011-08-01", "qty": 8}, {"date": "2011-08-11", "qty": 4}, {"date": "2011-08-12", "qty": 7}, {"date": "2011-08-13", "qty": 9}, {"date": "2011-08-14", "qty": 6}, {"date": "2011-11-29", "qty": 7}, {"date": "2012-01-24", "qty": 3}, {"date": "2012-02-05", "qty": 7}, {"date": "2012-02-20", "qty": 3}, {"date": "2012-02-24", "qty": 3}, {"date": "2012-03-07", "qty": 6}, {"date": "2012-04-23", "qty": 4}, {"date": "2012-05-14", "qty": 3}, {"date": "2012-05-15", "qty": 3}, {"date": "2012-06-11", "qty": 3}, {"date": "2012-06-21", "qty": 4}, {"date": "2012-08-13", "qty": 3}, {"date": "2012-08-15", "qty": 3}, {"date": "2012-08-18", "qty": 3}, {"date": "2012-08-24", "qty": 5}, {"date": "2012-08-25", "qty": 4}, {"date": "2012-08-26", "qty": 3}, {"date": "2012-11-09", "qty": 3}, {"date": "2012-11-20", "qty": 3}, {"date": "2012-11-26", "qty": 3}, {"date": "2013-03-25", "qty": 3}, {"date": "2013-09-10", "qty": 3}, {"date": "2014-09-17", "qty": 3}, {"date": "2014-11-11", "qty": 3}, {"date": "2015-07-17", "qty": 3}]