Prevent inserting repeating values - oracle

Question

I am still trying to insert values into a ratings table, I have tried 2 different approaches and both do the same thing my first approach is as follows:
DECLARE
rate NUMBER;
lv_cat NUMBER;
rate_num NUMBER;
BEGIN
FOR i IN 1..1
LOOP
INSERT INTO RATINGS (HOTELID, CATEGORYID, RATING)
SELECT a.IDHOTEL, b.CATEGORYID, INSTR(a.review, b.seed_words)
FROM review a, SeedWords b
WHERE a.IDHOTEL = i;
END LOOP;
END;
My second approach is:
DECLARE
i NUMBER := 1;
lv_hotel NUMBER := 1;
lv_rate NUMBER;
LV_RATE_NUM NUMBER;
lv_cat NUMBER;
hotel_match NUMBER;
cat_match NUMBER;
BEGIN
FOR rec_hotel IN (SELECT a.IDHotel AS lv_hotel,INSTR(a.review, b.seed_words) AS LV_RATE_NUM, b.CATEGORYID AS lv_cat
FROM review a, SEEDWORDS b)
LOOP
--DBMS_OUTPUT.put_line('start');
IF rec_hotel.LV_RATE_NUM > 0 THEN
lv_rate := rec_hotel.LV_RATE_NUM*.006;
ELSIF rec_hotel.LV_RATE_NUM < 1 THEN
lv_rate := rec_hotel.LV_RATE_NUM*10;
ELSIF rec_hotel.LV_RATE_NUM = 0 THEN
lv_rate := 8.6/3;
END IF;
INSERT INTO RATINGS
VALUES (rec_hotel.lv_hotel, rec_hotel.lv_cat, lv_rate);
--DBMS_OUTPUT.put_line(LV_RATE_NUM);
END LOOP;
END;
This is suppose to find words in the reviews. There are 4 categories that the words fall into so there are only supposed to be 4 ratings per hotel, but instead I am getting hundreds of ratings per hotel. What can I add into either block of code to make sure that for each hotelID there are only 4 records, one record for the rating of each categoryID?
My expected out put would look something like this with the rating value being the number of words found all the reviews for the the hotel:
HOTELID | CATEGORYID | RATING
1 | 1 | 5
1 | 2 | 10
1 | 3 | 2
1 | 4 | 6
2 | 1 | 6
2 | 2 | 10
2 | 3 | 4
2 | 4 | 2
My review table is the following:
Hotel Id | Review |
1 | "LARGE STRING"
1 | "LARGE STRING"
1 | "LARGE STRING"
1 | "LARGE STRING"
1 | "LARGE STRING"
1 | "LARGE STRING"
2 | "LARGE STRING"
2 | "LARGE STRING"
2 | "LARGE STRING"
2 | "LARGE STRING"
And My SeedWord Table is set up as follows
SEED ID| SEED_WORD|CATEGORYID
1 | "WORD" | 1
2 | "WORD" | 1
3 | "WORD" | 2
4 | "WORD" | 2
5 | "WORD" | 3
6 | "WORD" | 3
7 | "WORD" | 4
8 | "WORD" | 4
I hope this makes sense.