関連ワード:  how to use countif function in excel    how to use countif function    how to use countif function in google sheets    how to use countif function with multiple criteria    how to use countif function in excel for dates    how to use countif function in excel with multiple criteria    how to use countif function in excel to count text    how to use countif function in excel to find duplicates    how to use countif function in excel with color cell    how to use countif function in excel for multiple columns