Thank you very much for your comment @justjoy. I think it's nice to write long stuff but it's important to use subtitles to make it more readable. In addition subtitles increase also helps google to index your page for the search engine.
When I write a post, I tend to first write it in a text editor like word or open office write. There is a function in extras that allows to count words. In addition it helps me to find spelling mistakes ;-). Otherwise it might be an idea to write the posts in https://steempeak.com. There you can see the number of words on the prewiev (top right).

Best regards,
Achim