Simply optimizing a page for keywords is no longer enough to be considered truly relevant. It's no longer necessary for keyword X to appear a certain percentage of the text.
Not least because Google also recognizes synonyms nigeria cell phone number list and determines the context of the content. This means that pages that aren't optimized for a keyword can rank for it, but still cover the topic with high relevance.
Create content that is useful to the user
Instead of focusing on keyword density, the user should be the focus. Ask yourself:What triggers the search?
What problems or challenges need to be solved?
What questions does the user ask ?
What does he/she need to overcome these challenges as easily as possible?
Which content format is best?