Not exactly a few words in my experience, I would say every 100 words, if you sophisticate your Markov Chain (n-gram = 3 at minimum, using a good tokenizer, mak

Not exactly a few words in my experience, I would say every 100 words, if you sophisticate your Markov Chain (n-gram = 3 at minimum, using a good tokenizer, making it tailored to the training data, large training set (500Kbytes or +), intelligent fallback instead of random, etc.).