CodeCanyon - Wordpress Keyword Tool Plugin v2.2.0 - 2840111 | 595 KB
not only Wordpress keyword Tool works as WordPress keyword suggestion tool which will help you know keywords people are using to search so that you can target, it also will help you target these keywords the right way by checking keyword density ensuring that your article is search engine friendly and keyword optimized.
DEMO:
https://codecanyon.net/item/wordpress-keyword-tool-plugin/2840111