Rating: 5 stars
Usefull even in conjunction with yoast seo a.s.o. ( In that particular case the KDchecker set up on manual count, to prevent a slow keyboard writing )
It has a detailed overview, not only one keyword, but also 2 and 3 combined. Where for instance the Yoast SEO freeware stops after 1 keyword at the time.
Simple and efficient.
]]>