In advanced XML, the module for adding pages is <module name="Pager"> , but advanced XML is deprecated, so if you're able to recreate this dashboard in simple XML, that is recommended.
this is a sample of one of my leftover advanced XML dashboard that uses Pager in a SimpleResultsTable
<module name="PostProcess">
<param name="search">QUERY</param>
<module name="Pager">
<module name="SimpleResultsTable" />
<param name="cssClass">table-chrome table-striped</param>
<module name="SearchControls">
<param name="sectons"/>
<module name="Pager" />
</module>
</module>
</module>
</module>
</module>
as for the timechart, you might be able to add |sort - count |head 50 to the end of your search, or something similar to grab the top 50 'count' (insert correct field name).
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