Update value of specific key in a dictionary, contained in a list for one dictionary in the list raher than for all dictionaries in the list

Question

I have the following variables:

• A list called word_frequencies that has the same dictionary with all values 0, at each position of the list.
• A list called all_preprocessed_articles that has a vector that contains all the words from a particular article, at each position of the list. (Thus, len(word_frequencies) = len(all_preprocessed_articles))

The dictionary is a set of all the words in all the articles.

I have Initialised the list item, with all the dictionary items as follows:

word_frequencies = []

for word in vocab:
    temp_frequency_dict.update({word:0})

for i in range(0, num_articles): 
    word_frequencies.append(temp_frequency_dict)

With the following code, I am aiming to iterate through each vector i in all_preprocessed_articles and changing the dictionary i in the word_frequencies list for that word, by adding 1 to the value of that particular word (key).

for i in range(0, num_articles):
    current_article = all_preprocessed_articles[i]
    for word in current_article:
        word_frequencies[i][word] += 1

What I expect as output is that each dictionary in word_frequencies shows the frequencies for each word in that specific article. However, what it outputs is the same dictionary at each position in word_frequencies.

What can I do to so that the output is a list with i dictionaries in which each dictionary shows the occurrences per word in the corresponding article?