It's a nice post.
But according to Yoast SEO plugin, the keyword must appear in the title of the page, in Headings, first paragraph. I did not get to know that we have to include the keyword in last paragraph. I maintain the keyword density from 2.0% to 2.5% as many authors have told that the density should be between 4.0% to 5.0%.
Apart from these, I use the keyword for images I include.
Thanks & Regards,