title: Update pandas df from dict
body: <p>I'd like to update the 'frequency' column in my df 'co_names_df_1' from the
  values in the dict 'counts':</p>
  
  <pre><code>counts:
  Counter({u'Apple': 1638, u'Facebook': 1169, u'Amazon': 1027, u'Boeing': 548, u'Microsoft': 437, u'JPMorgan': 435, u'Nasdaq': 364, u'Williams': 296, u'Disney': 270, u'Netflix': 260, u'Chevron': 258, u'Comcast': 213, u'CBS': 200, u'Carnival': 193, u'Intel': 188, u'IBM': 172, u'Starbucks': 165, u'Target': 143, u'Monsanto': 141, u'PayPal': 133, u'Viacom': 126, u'Equifax': 124, u'Anthem': 123, u'Pfizer': 121, u'Nike': 121, u'Caterpillar': 119, u'Citigroup': 116, u'AIG': 116, u'HP': 109, u'Aetna': 109, u'BlackRock': 109 ...
  
  co_names_df_1:
           Name          Frequency
  0        3M            0
  1        A.O. Smith    0
  2        Abbott        0
  3        AbbVie        0
  4        Accenture     0
  5        Activision    0
  6        Acuity Brands 0 ...
  </code></pre>