Historic period (3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">historic period</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for era that I've seen before include "Special time" , "Are involved in time span" , "Important time" , "Geological period" , "8" .)
(Other definitions for eon that I've seen before include "Immense period" , "Huge time period" , "Very long period (US and technical spelling)" , "Age, epoch" , "plenty of time" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">historic period</span>' is the definition.<br/ ><span class="explanation-format__explanation">(term for an era or age)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for epoch that I've seen before include "Point in time fixed by some great event" , "Geological time period" , "Period of time in history" , "Historical period" , "Period of notable events" .)