График частотности: удальцова

[{"date": "2012-03-15", "qty": 6}, {"date": "2012-03-16", "qty": 6}, {"date": "2012-03-18", "qty": 4}, {"date": "2012-04-21", "qty": 4}, {"date": "2012-04-29", "qty": 3}, {"date": "2012-05-09", "qty": 14}, {"date": "2012-05-12", "qty": 3}, {"date": "2012-05-14", "qty": 3}, {"date": "2012-06-11", "qty": 22}, {"date": "2012-06-12", "qty": 3}, {"date": "2012-06-13", "qty": 3}, {"date": "2012-09-05", "qty": 6}, {"date": "2012-09-26", "qty": 3}, {"date": "2012-10-07", "qty": 3}, {"date": "2012-10-17", "qty": 16}, {"date": "2012-10-18", "qty": 19}, {"date": "2012-10-19", "qty": 5}, {"date": "2012-10-23", "qty": 3}, {"date": "2012-10-27", "qty": 7}, {"date": "2012-10-30", "qty": 22}, {"date": "2012-10-31", "qty": 3}, {"date": "2012-11-03", "qty": 6}, {"date": "2012-12-04", "qty": 3}, {"date": "2013-01-17", "qty": 3}, {"date": "2013-02-08", "qty": 4}, {"date": "2013-02-09", "qty": 15}, {"date": "2013-02-12", "qty": 4}, {"date": "2013-02-16", "qty": 9}, {"date": "2013-03-06", "qty": 3}, {"date": "2014-02-18", "qty": 3}]