input: Write a python function to count the frequency of each word in a list.
  assert count_word_frequency(["hello","world","hello","python","hello"]) == {"hello": 3, "world": 1, "python": 1}
  assert count_word_frequency(["apple", "banana", "apple", "orange", "banana", "apple"]) == {"apple": 3, "banana": 2, "orange": 1}
  assert count_word_frequency(["test", "test", "test", "test"]) == {"test": 4}
output: def count_word_frequency(word_list):
      frequency = {}
      for word in word_list:
          if word in frequency:
              frequency[word] += 1
          else:
              frequency[word] = 1
      return frequency