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A tool called a "keyword density checker" will assist you in determining the number of times a particular word appears in the content. That will assist you in better optimizing your content and avoiding spam using a particular keyword.
This tool will ask for the URL of your blog post; simply provide it and click the "Submit Now" button. The tool will scan your content and provide you with a comprehensive list of the number of times and overall density of keywords you used in your blog post.