Page Word Count
Page Word Count is a free tool that displays the number of times each word is displayed in a body of text.
Did you know that you can check the popularity of each of the above keywords via keyworddiscovery.com.
You can even supply a URL and Keyword Discovery will extract all the unique keywords from that URL and produce a report displaying both the keyword densities along with the search terms popularity.
As an added benefit Keyword Discovery can also be set to generate unique keyword phrases, not just single words, that this tool is limited to.
There is a free trial available at keyword research and search term suggestion tool.