Словарь со списком как значения
word_freq = {'is': [1, 3, 4, 8, 10],
'at': [3, 10, 15, 7, 9],
'test': [5, 3, 7, 8, 1],
'this': [2, 3, 5, 6, 11],
'why': [10, 3, 9, 8, 12]}
Chunxiao Wang