Some macro quantitative features of low-frequency word classes

This contribution examines the macro quantitative features of 15 lowfrequency word classes. The relationship between word frequency classes and the sizes of the frequency classes obeys Altmann’s power law, and the sizes of lowfrequency word classes increase along with the increase of text length. The relationship between text length and the sizes of low-frequency word classes also obeys Altmann’s law. For text of the same length, the relationship between vocabulary size and the sizes of hapax legomena and dis legomena is linear, but this sort of relationship does not hold for other low-frequency word classes. The relationship between vocabulary/low-frequency word class ratio and text length can be captured with reparametrized Tuldava’s model.