How to get count of each item in my SSRS report using an expression in the RDL file

How to get count of each item in my SSRS report using an expression in the
RDL file

I am a noob in SSRS reports. So please forgive any mistakes in the
question. I have a SSRS report which looks like this
monday tuesday wednesday thursday friday saturday sunday
ABC
ABC
DEF
ABC
DEF
I need to calculate count of each item in the list as follows
ABC 3
DEF 2
Is there a way to do this in the RDL using an expression such as aggregate
or count