There are two ways to accomplish:
1) Use the FIND function in a formula. However, it can only check one cell at a time. here's how:
FIND (find_text, within_text, start_num)
Find_text is the text you want to find.
Within_text is the text containing the text you want to find.
Start_num specifies the character at which to start the search. The first character in within_text is character number 1. If you omit start_num, it is assumed to be 1.
2) Use the replace function (Not in formula). This will give you total occurences when finished replacing. However, it doesn't tell you what cells they were in! Here's how:
Click EDIT, choose REPLACE, fill in "Find What" and "Replace with" then click "Replace All". After its finished Excel will tell you how many it replaced. Then click undo button to reverse the changes.
I hope these prove helpful to you.
Regards,
QwertyKPH @ Yahoo