What do you expect from keyword density analysis tools?

Hello,

I am writing a keyword density analysis tool to learn a few concepts. I am not a SEO expert so I would really appreciate some feedback. Apart from returning an excel-readable list of keywords and their frequencies here's what the tool does:
- It discards common words (the, a, if, and ...).
- You can indicate the maximum number of keywords you want.
- It can analyze single keywords, or bigrams, trigrams or more.

My question is: are there any other features you expect from keyword density tools or wish they had? It's a .exe but I can share a link if anyone is interested.

Thanks

 

please clearly define the question i don't understand what do you want to asked.

 

Sure. I am looking for features to add to my basic keyword density tool. An example would be language support: I haven't seen tools that allow to choose the language to use to analyze a page. Are there other things that could be useful?

 

You can check your keywords density http://tools.seobook.com/general/keyword-density/

 

Will it analyse keywords in titles, seo title and meta description? Reason I ask is plugins like Yoast seo don't and people over optimise without even knwoing