title: Python count everytime a string is found in another string
body: <p>I'm trying to enumerate the time the program finds a specific string in a longer text but I'm stuck, the program shows the length of the response string instead of the times <code>ultrias</code> is present in response. Here's the code:</p>
  
  <pre><code>ultrias = "am 17"
  response = "Hi i am 17, did you know I am 17"
  num = 0
  for ultrias in response:
      num += 1
  print (num)
  </code></pre>