How do I know which score is the highest frequency? how do I figure the scores had a frequency of 2?

To determine the score which presents the highest frequency, we need to check the last column, the frequency one, and find the highest value among them. The score which is in the same row that this value will be the score with the highest frequency.
Once we check the frequency column once again, we see that the 2nd, the 4th, and the 7th rows have a frequency equal to 2.