Question

For english we have "504 essential words" list. Do we have the same for Finnish?

Answer 1

If you are looking for an actual book, I don’t know.

But Random Finnish lessons blog has a list 100 most common words and in the same post a link to 5000 most common words:

http://randomfinnishlesson.blogspot.com/2014/02/100-very-common-finnish-words.html?m=1

Answer 2

There are user-created word lists on Memrise: https://app.memrise.com/courses/english/finnish/.

Answer 3

I googled 'taajuussanakirja' and found this: https://korp.csc.fi/suomen-sanomalehtikielen-taajuussanasto-B9996.txt

Apparently the words are from newspapers, but I don't know from what time period. The list is definitely quite old, because it has the word 'markka'. :)