Keyword Density Tool
This tool is designed to provide a detailed report on the density of keywords and phrases found within a webpage.
Keyword density is the frequency a specific keyword or phrase appears in a block of text, in this case a web page. General rule, the keywords or phrases with the greatest density will perform better within the search engine results.
Keyword density is key to helping search engines identify the theme of a webpage. With the correct balance of keywords your webpage will perform well within the search engine results, to many keywords, thus a high density count; you risk your site being penalized for "keyword spamming" or stuffing.
Keyword Density Tool - AddMe