However, it was found by Virpioja, Kohonen, and Lagus (2011) that performance does not improve consitently with growing data because the method segments less on average for each added training word form.
we optimize the training data size by including only the most frequent words in the following sizes: 10k, 20k, 30k, 40k, 50k, 100k, 200k, 400k, .