Numbers can be expected to appear with regular frequencies. In this subsection we present the frequencies for the most frequent cardinal numbers with a fixed number of digits.
For very small numbers, the ordering by frequency is nearly the natural ordering with a slight preference for round lots.
In the case of four-digit numbers we usually get years. Here we see the temporal focus of the corpus.
The frequency of numbers, compared to usual words gives some hint to measure the technicality of the corpus.
As seen above, four-digit numbers show the temporal focus of the corpus.
A strong disorder for small numbers may result from corpus anomalies.
For smooth results we need a corpus of at least medium size.
For N=4:
select word, freq from words where word regexp "^[0-9]{4}$" limit 10;
3.3.2.2: Frequency of numbers of special patterns II: Ordinal numbers
3.3.2.2: Frequency of numbers of special patterns III: Decimal numbers, ranges etc.