pub fn english_lowercase() -> &'static HashMap<char, f64>Expand description
Returns the frequencies of each letter of the English alphabet as a map between
characters and percentage of words they appear in. The returned map will include
only lowercase characters. To get a different subset, use Frequency::english_uppercase()
or Frequency::english() for both.
§Performance
This is O(1).
§Returns
A map of letters and their frequencies.