Over ten years ago now, I made a tool for analysis Chinese text, which I wrote about here. I was asked about, so I've started to make an online version on this page. Chances are, I won't get much further than this.
Below is a text box - enter your text and click the button and it will give a table of how often each word appears. It currently only splits on English punctuation, and even then, not all of it. I don't split on single quote marks because I want words like "aren't" to stay as a word.
It's a start...