How many keywords in a blog post?
 

As a part of blog post's on page SEO, a blogger needs to include focus or targeted keyword in the post. Every experts say we need to include keyword at the beginning and end of post. Don't we have to include keywords in the body? If yes, how many?

I think, 3 keywords are enough in 1 blog post. You can include 1 at the start and 1 in the mid and 1 at the end.

Similar to a web page blog page should not contain more than max 5 keywords in a web page..

I think there is no specific count for adding keyword in a content. We need to check the keyword density and maintain to 1% - 1.5%.
For example, if a blog post contains 500 words, we can add 4 keyword in the post.
So a blog post with 1000 words, we can add 8 keyword in it.

I conclude, adding keywords in content depends on the total number of words in post