How can i show the Count of Contributions in a give time period?
If Summary Fields does not have the fields you need, it's pretty easy to add your own using hook_civicrm_sumfields_definitions()

Try dropping something like this into an extension:

/**
 * Implements hook_civicrm_sumfields_definitions().
 *
 */
function myextension_civicrm_sumfields_definitions(&amp;$custom) {
  $custom['fields']['contribution_count_twelve_months'] = array(
    'label' =&gt; 'Count of Contributions in last 12 months',
    'data_type' =&gt; 'Int',
    'html_type' =&gt; 'Text',
    'weight' =&gt; '15',
    'text_length' =&gt; '32',
    'trigger_sql' =&gt; '(
      SELECT COALESCE(COUNT(id), 0) 
      FROM civicrm_contribution t1
      WHERE t1.contact_id = NEW.contact_id AND t1.contribution_status_id = 1 AND
      t1.financial_type_id IN (%financial_type_ids) AND 
      CAST(receive_date AS DATE) BETWEEN DATE_SUB(NOW(), INTERVAL 12 MONTH) AND NOW()
      )',
    'trigger_table' =&gt; 'civicrm_contribution',
    'optgroup' =&gt; 'fundraising',
  );
}


Tweak the trigger_sql for your preferred time interval.

See the Readme for more info.