check if the word is in the special word of the string, if so, add to dictionary along with count

def find_word(string, word):
  string_list = string.split()
  word_dict = {}
  for i in string_list:
    if i == word:
      if i in word_dict:
        word_dict[i] += 1
      else:
        word_dict[i] = 1
  return word_dict

find_word("My name is Joy. I like computer science.", "joy")