Reverse of word list: how to generate a text attribute by repeating a value?

Hello Community,

what I am trying to do is somehow the reverse of the aggregate operator or the word list. I have an example set (document) with a nominal attribute (word) and a numerical attribute (frequency=n). I want to generate a new text attribute with the word repeated n times, separated by space.

I can't find an operator to do this. I tried generate attributes, but I can't find a mathematical expression for what I want to do. As it seems to me rather simple a process, I hope I did not miss anything posted in the community already. I searched but I couldn't find anything.

Anybody who can help me?