Solved by Abhilash_Srivastava in post #2 
              
              
                Great question! 
From what I see in these two files: field.py and vocab.py it’s based on the frequency. 
    for word, freq in words_and_frequencies:
        if freq < min_freq or len(self.itos) == max_size:
            break
        self.itos.append(word)

The code above ensures itos handles the ma…