title: Regex to match when a string is present twice
body: <p>I am horrible at RegEx expressions and I just don't use them often enough for me to remember the syntax between uses.</p>
  
  <p>I am using grepWin to search my files.  I need to do a search that will return the files that have a given string <strong>twice</strong>.</p>
  
  <p>So, for example, if I was searching on the word "how", then file one would not match:</p>
  
  <blockquote>
    <p>Hello<br>
    how are you today?</p>
  </blockquote>
  
  <p>but file two would:</p>
  
  <blockquote>
    <p>Hello<br>
    how are you today?</p>
    
    <p>I am fine, how are you?</p>
  </blockquote>
  
  <p>Any one know how to make a RegEx that will match that?</p>