input: Write a python function to count occurrences of a target word in a list of words.
  assert countOccurrences(["how", "how", "are", "you", "how", "are", "you"], "how") == 3
  assert countOccurrences(["apple", "banana", "apple", "orange", "apple"], "apple") == 3
  assert countOccurrences(["one", "two", "three", "four", "five"], "six") == 0
output: def countOccurrences(word_list, target):
      return word_list.count(target)