title: Bug between asfreq and resample in pandas?
body: <p>I am trying to understand the difference between resample and asfreq but I can't sem to wrap my head around it, in the example below I took the same dataframe and used resample and asfreq but when I count the values I get different results, how is this possible?</p>
  
  <pre><code>df = pd.concat([tt.asfreq('B').count(), tt.resample('B').count()], axis=1, keys = ['asfreq(B)', 'resample(B)'])
  df['Diff'] = df['asfreq(B)'] - df['resample(B)']
  
  df
  
      asfreq(B)   resample(B) Diff
  AXP 39          47          -8
  BA  81          84          -3
  CVX 47          60          -13
  KO  74          82          -8
  DD  77          79          -2
  </code></pre>