from collections import Counter
tplList = [(4, 9, 0), (3, 4), (4, 9, 0), (4, 9, 0), (5), (1, 2), (3, 4)]
frequency = [(key, val) for key, val in Counter(tplList).items()]
print(frequency)
'''
run:
[((4, 9, 0), 3), ((3, 4), 2), (5, 1), ((1, 2), 1)]
'''