[sql] How to return result of a SELECT inside a function in PostgreSQL?

I have this function in PostgreSQL, but I don't know how to return the result of the query:

CREATE OR REPLACE FUNCTION wordFrequency(maxTokens INTEGER)
  RETURNS SETOF RECORD AS
$$
BEGIN
    SELECT text, count(*), 100 / maxTokens * count(*)
    FROM (
        SELECT text
    FROM token
    WHERE chartype = 'ALPHABETIC'
    LIMIT maxTokens
    ) as tokens
    GROUP BY text
    ORDER BY count DESC
END
$$
LANGUAGE plpgsql;

But I don't know how to return the result of the query inside the PostgreSQL function.

I found that the return type should be SETOF RECORD, right? But the return command is not right.

What is the right way to do this?

Hi please check the below link

https://www.postgresql.org/docs/current/xfunc-sql.html

EX:

CREATE FUNCTION sum_n_product_with_tab (x int)
RETURNS TABLE(sum int, product int) AS $$
    SELECT $1 + tab.y, $1 * tab.y FROM tab;
$$ LANGUAGE SQL;