Making a Bar chart with list of things as data


I am trying to make a Bar Chart using the plugin Apex Charts.
i need help to show data type field (hear about us ) which is a list of things on x axis and count of ( hear about us ) on y axis

it need to show data in this chart , current it shows all the counts in just the first column and is showing repeated field in the x axis .

These are the expressions i am using

Please help me out on building the right expression for it .

Plug-in i am using :