excel text analysis

I am completely new to Knime.

I have an excel file with several sheets containing words in the cells (one cell=one word). I would like to see which words cooccur together? I thought I need text prcessing, but since it is stored in an excel file I do not know how to connect the text data in excel with the text processing abilities of knime. If somebody could help me it would be great; if somebody knows a possible workflow too for the entire process it would be a great help.  Thanks

Not quite sure how you define co-occurrence if it's one word = one cell, but the "String to Document" node gets you into text-processing format compatibility. You may wish to use the "GroupBy" node with the "Concatenate" aggregation before, though.