The following are a collection of frequency lists for various languages. I will only list those that present their sources, and are complete frequency lists (no words intentionally omitted). These are grouped by vocabulary list size and by language.
As it says in the link, all words with less than 200 hits were removed, because there was too much interference from words that aren’t actually in Indonesian. And the words were only taken from non-professional fiction writing, nothing like newspapers or Twitter.
EDIT: Oops, didn’t realize you meant “courses created from word frequency lists” and not “actual word frequency lists”. Oh well.