Probably something like what "Metalists" do, so like extrapolating information from other sources about you, and that would maybe to find the pattern or at least reduce the number of words to do the brute force.

I amnjust making assumptions anyway, but I think would be like the differences between playing cards with same cards for more rounds, and just shuffle the same everytime, or using a new package for every play. The last option probably is more random then the first one.. again IMO.