If you repeat your keywords in each line, your items will probably be rejected as man-made objects or items of spam. Keyword density is always expressed as a percentage of the total content of words in a particular article. Suppose that your item has 100 words (not including HMTL code used for writing the article), and you use a keyword determined five times in the content. The density of keywords on that page is obtained simply by dividing the total number of keywords, by the total number of words that appear in your article. So here it is 5 divided by 100 = 0.05. If the density of keywords is a percentage of the total number of words on the page, multiply the above by 100, which is 0.05 x 100 = 5% the accepted standard for a keyword density is between 3% and 5%, recognized by the search engines and you should never exceed. Remember, that this rule applies to all pages of your articles. Also applies to not only to a keyword, but also a set of keywords that relates to a product or service different.
The density of keywords should always be between 3% and 5%. Here are some simple steps to check the density: copy and paste the contents of an individual item in a program such as Word or Word Perfect text processing software. Go to the Edit menu and click Select all. Now go to the Tools menu and select Word count. Write down the total number of words on the page. Then, select the find function in the Edit menu option. Go to the change tab and enter the keyword that you want to find.
Replace that Word with the same word, so it does not change the text. When you have completed the replacement of the function, the system will provide a count of the words that replace. This gives you the number of times that they have used the keyword in that page. With the total number of words on the page and the total number of keywords can now be calculate the density of keywords.