There are so many online keyword analysis tools are available..
You can think about how many words on your page there are. Divide that into the number of times you use your key phrase, and multiply by 100%. So if you have 500 words on your page, and you use your phrase 5 times, you’d have a 1% keyword density: 5/500 times 100% = 1%
Keyword density is based on the total number of words placed on the web to increase apply density page. But the several times, this could damage the site and the title, description and the top is the best place to obtain and maintain a higher priority.
Keyword Density is occurrence of duplication of provided keyword or phrase in body text on web site. The higher frequency is greater likelihood of a higher ranking in search results.