We're almost done! We need to group again now based on the total commits per author. group-by takes in blocks now and throwing at it a few conditionals stmts is plenty. 

alias my-criteria? [t] { if $t &lt;= 5 { = "poquito" } { if $t &gt; 5 &amp;&amp; $t &lt;= 15 { = "moawr" } { = "fire" } } }