计算一个数据帧中的唯一值，其中唯一值范围在另一个数据帧中定义

I have two different data frame below, Scale is the allowable score range/point and in this case is 1-5. Score is the actual score provided by participant using the value defined in Scale. I need count the number of score for each scale point in the Score Data frame. for example, there are two counts of 2 in Score,while zero count of 1.I have two different data frame below, Scale is