Does it make a difference if your blog has more than 1 post with same keywords??

Google ranks the pages separately right. So if I had a blog about hamster cage. Would it matter if I have 1 post using high keyword density for "hamster cages", or if I had 10 articles all about hamster cages?

Or is it better to just have 1 post for those keywords and move on to next set of keywords, like "hamster cages that glow in the dark", and "spin wheels for hamster cages" lol. Sorry just felt like adding those 2 in there.

IMO no it doesn't matter. That's what blogs were set up for is to talk about a topic. So if you look at it that way then go right ahead and use your key terms cause there is only so many ways that you can say it.