CAN frame dataset analysis

I have a huge dataset of CAN frames, used in automotive. I have read the data correctly in KNIME. The data row have the following form:

I want to make a histogram about the most repeated frame (in terms of checking data column and dlc column only).

I can do so for dlc column as it is already parsed as number. But my question is how to check data column (which is string) together with dlc column and make analysis on both?