Click Tools -> Word / Line Counter to count the number of characters, words, and lines in some text.

If a dictation is selected when the counter is open, the text will default to the notes from the dictation, and the number of characters, words, and lines will be automatically calculated.

Click Recalculate to re-count the number of characters, words, and lines if the text changes. e.g., After pasting text from another application.