If you wish to count the same or duplicate values in a column only once in Excel or the count of occurances of duplicate values, read this article.

Use Excel data validation to prevent duplicate values in a column Your email has been sent Prevent duplicates before they happen by combining a simple function with data validation. Excel has ...

When counting unique values in Microsoft Excel, use UNIQUE() as a helper function and avoid more complicated expressions.

How to Count Line Numbers in Excel VBA. Text in an Excel cell may span several lines. For example, cells in a sheet listing employees may contain extended comments on each worker's performance.