how to count specific word in a listview column - vb.net

Question

I have a form which is 1 list view and a text box.
* list view has a total of 100 rows of data
* list view has 5 columns
* column 3 has only two possible words yes or no
I want to count the number of occurrence of the word yes in column 3
the total row can be count with this code:
''''''''''COUNT TOTAL ADMISSION''''''''''''''
Dim rowcount As Integer = 0
For Each item As ListViewItem In LVfeestatementBA_I.Items
rowcount = CInt(item.SubItems(0).Text) 'Considering every column always have some value
Next
txttotaladBA_I.Text = rowcount.ToString()
any help will be greatfull
EDIT 1
This is a school assignment. As I said my aim is to find out the number of occurrence of a word in column 3. I have database of MS access which is connected with code and provides the data for the list view. The list view has 5 columns and there are a total of 100 rows. The data in col-3 contains only three words gen, occ, and cc. Now in want to count col-3 for the words with code and show the number like (68) in textbox1
EDIT 2
I applied the function provided by thedarkspoon, but it's not showing the result. I just want the result to be shown in textbox1, ex. if total number of words are 78 then at the time of form_load it should show 78 in textbox1. I solved the problem by adding at last textbox1.text = numofyes and change variable from integer to string now its working

Answer 1

I did not quite understand your scenario (you have to be more clear).
Anyway, given a ListView that displays items that each have 3 subitems and we know that the third subitem will have values of either "yes" or "no" we can build a query like (using linq):
var collectionOfListViewItems = listView1.Items.Cast<ListViewItem>();
var numberOfrowsWithTheThirdSubItemTextEqualToYes = (from c in collectionOfListViewItems where c.SubItems[3].Text == "yes" select c).Count();
Without linq you could do a foreach:
var numberOfrowsWithTheThirdSubItemTextEqualToYes = 0;
foreach (ListViewItem item in listView1.Items)
{
if (item.SubItems[3].Text == "yes")
numberOfrowsWithTheThirdSubItemTextEqualToYes++;
}

Answer 2

Ok here you go, I made this a function but you could easily adapt this to a subroutine:
Function countyes()
'Set up a variable to count the number of yes:
Dim numofyes As Integer = 0
'Count the number of yes (Replace listview1 with the name of your listview):
For Each item As ListViewItem In ListView1.Items
'If the Yes/No is in column 3, you are looking in subitem 2:
If item.SubItems(2).Text = "Yes" Then
'Increment the variable by one if the value is yes:
numofyes = numofyes + 1
End If
Next
'Return our total number of Yes that we found:
Return numofyes
End Function
Hope this helps!