gouri - 2:48 am on Jun 4, 2013 (gmt 0)
Thanks for the post.
Google is looking at the words that relate to your keywords, too--not just your keywords. Keep that density within reasonable levels and your readers, and probably the search engines, will thank you.
For the words that relate to your keywords, is Google looking at a particular part (e.g., Paragraphs, headings, etc.) of a Web page or the page overall.