title: How to list all positions of a variable in a list?
body: <p>I have a large list of text strings. I know that some strings occur more than once in this list. The frequency with which the strings occur are in the next column.</p>
  
  <p>Now, let's say the text string "hello" occurs 17 times. How would I get all positions of this text within the list? </p>
  
  <p>Any help is appreciated. </p>