title: Multiple grids on matplotlib
body: <p>I'm making plots in Python and matplotlib, which I found huge and flexible, till now.</p>
  
  <p>The only thing I couldn't find how to do, is to make my plot have multiple grids.
  I've looked into the <a href="http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.grid" rel="nofollow noreferrer">documentation</a>, but that's just for line style...</p>
  
  <p>I'm thinking on something like two plots each one with a different grid, which will overlap them.</p>
  
  <p>So, for example I want to make this graph:</p>
  
  <p><a href="http://img137.imageshack.us/img137/2017/waittimeprobability.png" rel="nofollow noreferrer">Alt text http://img137.imageshack.us/img137/2017/waittimeprobability.png</a></p>
  
  <p>Have a similar grid marks as this one:</p>
  
  <p><a href="http://img137.imageshack.us/img137/6122/saucelabssauceloadday.png" rel="nofollow noreferrer">Alt text http://img137.imageshack.us/img137/6122/saucelabssauceloadday.png</a></p>
  
  <p>And by that, I mean, more frequent grids with lighter color between important points.</p>