------
## 最终结论
```python
def frequency_lists(list_of_lists):
    frequency_dict = {}
    for sublist in list_of_lists:
        for item in sublist:
            if item in frequency_dict:
                frequency_dict[item] += 1
            else:
                frequency_dict[item] = 1
    return frequency_dict

# Test cases
assert frequency_lists([[1, 2, 3, 2], [4, 5, 6, 2], [7, 8, 9, 5]]) == {1: 1, 2: 3, 3: 1, 4: 1, 5: 2, 6: 1, 7: 1, 8: 1, 9: 1}
assert frequency_lists([[1,2,3,4],[5,6,7,8],[9,10,11,12]]) == {1: 1, 2: 1, 3: 1, 4: 1, 5: 1, 6: 1, 7: 1, 8: 1, 9: 1,10:1,11:1,12:1}
assert frequency_lists([[20,30,40,17],[18,16,14,13],[10,20,30,40]]) == {20:2,30:2,40:2,17:1 ,18:1 ,16:1 ,14:1 ,13:1 ,10:1}
```