suggest you only use one keyword or variations of that keyword per
content page. Instead of writing on 3 - 4 different keywords. This
allows your content page to be more relevant and in return allows that
page to rank higher in the search engines.
We suggest you write as natural as you can and for your content to be informative. Do not try to keyword stuff your content pages. Users and search engines can tell when you try to write just for the search engines, for one it doesnt make sense and is useless so the user and search engines will just ignore the pages.
When writing your content make sure the content is 100% unique do not ever copy content from another site. Google can and will penalize your site for duplicate content. You want to have atleast 250 words when creating your content page because Google needs something to go by so they know what the page is about.