No parameter.
Count words and characters found in explicit text or node selection, if any, and in the whole document otherwise. Displays results in the status line.
Note that:
Something like: "<b>B</b>old" is counted as 2 words ("B" and "old") and not just 1 word ("Bold").
Words are substrings separated by various word separators, among them all kinds of space characters. However, in order to be counted, a word must contain at least 1 letter or 1 digit. For example, "http://192.168.1.1/" contains 2 words: "http" and "192.168.1.1".