public void setMaximumExecutionFrequency(String maximumExecutionFrequency) {
        this.maximumExecutionFrequency = maximumExecutionFrequency;
    }
<p>
The frequency at which you want Config to run evaluations for a custom rule with a periodic trigger. If you
specify a value for <code>MaximumExecutionFrequency</code>, then <code>MessageType</code> must use the
<code>ScheduledNotification</code> value.
</p>
<note>
<p>
By default, rules with a periodic trigger are evaluated every 24 hours. To change the frequency, specify a valid
value for the <code>MaximumExecutionFrequency</code> parameter.
</p>
<p>
Based on the valid value you choose, Config runs evaluations once for each valid value. For example, if you
choose <code>Three_Hours</code>, Config runs evaluations once every three hours. In this case,
<code>Three_Hours</code> is the frequency of this rule.
</p>
</note>

@param maximumExecutionFrequency
       The frequency at which you want Config to run evaluations for a custom rule with a periodic trigger. If
       you specify a value for <code>MaximumExecutionFrequency</code>, then <code>MessageType</code> must use the
       <code>ScheduledNotification</code> value.</p> <note>
       <p>
       By default, rules with a periodic trigger are evaluated every 24 hours. To change the frequency, specify a
       valid value for the <code>MaximumExecutionFrequency</code> parameter.
       </p>
       <p>
       Based on the valid value you choose, Config runs evaluations once for each valid value. For example, if
       you choose <code>Three_Hours</code>, Config runs evaluations once every three hours. In this case,
       <code>Three_Hours</code> is the frequency of this rule.
       </p>
@see MaximumExecutionFrequency
aws-java-sdk-config/src/main/java/com/amazonaws/services/config/model/SourceDetail.java