Custom comment field word submit and creates toplist

I want to display next to the post content values that are submitted through a custom comment field. The function that I’m trying to make is
creates a top list where the top 5 are the most submitted words appear. I want to make that post specific. For each individual single post must have a top 5 words list. Now it makes a top list from all the submitted words at all the posts.

Here is what I did so far:
[Code moderated as per the Forum Rules. Please use the pastebin]

‘etiqueta’ means label in English
The tables that are affected are:
–wp_commentmeta: meta_id; comment_id; meta_key; meta_value columns
–wp_postmeta: meta_id; post_id; meta_key; meta_value

Can anyone help me with this?