showing frequency of value in Listbox as Text

[#1]

I have this Listbox

and I need to show the frequency of the values (i.e. B6) in an textbox as text, like this

Is this possible without doing it in the script, something like "count(if(PF='B6')"

Thanks a lot and best regards

Thomas

[#2]

See attached.

[#3]

I forgot: without selecting the value

Later it has to look like this with many textboxes, each showing one value.

[#4 · Accepted solution]

Yep, just use set analysis. See attached.

[#5]

mhhh, I was thinking about a similar solution but always got an '-'

Thnak you very much