Column or histogram plot labels

[Dave_My]

I am trying to use labels as opposed to numbers on secondary vertical axis of a histogram or column chart.  Primary would be numeric values but values would be hidden.  Ideas would be appreciated.

[#2]

@Dave_My 

Ideas are here https://www.myonlinetraininghub.com/excel-chart-vertical-axis-text-labels and https://policyviz.com/2014/12/15/custom-yaxis-labels-in-excel/ and you may google for more