Google Spreadsheets....need a simple formula

I have a Google spreadsheet with 2 separate columns of over 200 lines long each.

I have spend 2 days looking for a formula that will count the empty cells (the full cells have no numeric values in them, just a X) I have tried every combination possible......COUNTBLANK, COUNT, ISBLANK, ISNUMBER......

Can someone be so kind as to tell me the exact wording I need to write in the formula bar.......

I know it should be really simple but it's not to me......

:confused

Thank you

Onnha

 

Perhaps
https://support.google.com/drive/bin/static.py?hl=en&topic=25273&page=table.cs&tab=1240290
ISBLANK
if not remove the word INFO in the filter box and look at other commands.

 

Do you mean =ISBLANK(B2:B213)

INFO in the filter box?

Yikes, I hate being thick....

 

I have no idea because I do not use google docs and very rarely use spreadsheets.

 

Try COUNTIF. It worked for me. Here's a reference: http://spreadsheets.about.com/od/otherspreadsheets/qt/090804-google-spreadsheets-countif.htm