Get frequency data into chart.js #4

Check chart.html for an example chart (http://www.chartjs.org/docs/latest/charts/line.html). We need to get data from this format:
[ { timestamp: '0x5a626c7e',
totalTransactions: '189',
contractFreq: '0' },
{ timestamp: '0x5a626c83',
totalTransactions: '195',
contractFreq: '0' },
{ timestamp: '0x5a627783',
totalTransactions: '152',
contractFreq: '0' } ]

into a chart with a timeseries x axis.