LibreOffice 7.2 ヘルプ
Counts the words and characters, with or without spaces, in the current selection and in the whole document. The count is kept up to date as you type or change the selection.
メニュー ツール → 文字カウント
In general, every string of characters between two spaces is a word. Dashes, tabs, line breaks, and paragraph breaks are word limits, too.
Words with always visible hyphens, as in plug-in, add-on, user/config, are counted as one word each.
単語には、文字の他、数字、特殊文字が含まれます。abc123 1.23 "$" http://www.example.com は、4 語と計算されます。
To add a custom character to be considered as the word limit, choose LibreOffice - PreferencesTools - Options - LibreOffice Writer - General and add the character into the Additional separators field.
File - Properties - Statistics