title: Sort by popularity
body: <p>I have 'records' table with two columns "meta_value" and "field_id":</p>
  
  <pre><code>meta_value  field_id    item_id
  Customer    11      1
  Sweden      1       1
  Second      1       1
  First       1       1
  Done        1       2
  No      1       2
  First1      2       2
  First2      2       2
  Finland     2       3
  Customer    11      3
  112233      2       3
  Booked      2       3
  First NAme  89      4
  Last Name   9       4
  Belgium     3       4
  Customer Name   11      4
  11223344    12      5
  Booked      3       5
  First Name2 89      5
  Last Name2  9       5
  The Netherlands 10      6
  Customer Name2  11      6
  221133      4       6
  Booked      4       6
  </code></pre>
  
  <p><code>Item_id</code> means id of the form submitted on the website, <br>
  <code>field_id</code> - parameter name in the form  <br>
  and <code>meta_value</code>  - the value of this parameter.<br></p>
  
  <p><code>field_id=1</code> is the name of the person (value is stored in <code>meta_value</code>), <code>field_id=2</code> is the keyword (value is stored in <code>meta_value</code>), which this person has entered.</p>
  
  <p>What I need to do is to show top-5 persons, who entered "booked" as a keyword the most times.<br>
  I'm not very good in MySQL requests, so maybe someone can help me?</p>