Humans　have　the　ability　to　store　and　retrieve　memories　with　various　degrees　of　specificity,　and　recent　advances　in　reinforcement　learning　have　identified　benefits　to　learning　when　past　experience　is　represented　at　different　levels　of　temporal　abstraction.　How　this　flexibility　might　be　implemented　in　the　brain　remains　unclear.　We　analyzed　the　temporal　organization　of　male　rat　hippocampal　population　spiking　to　identify　potential　substrates　for　temporally　flexible　representations.　We　examined　activity　both　during　locomotion　and　during　memory-associated　population　events　known　as　sharp-wave　ripples　(SWRs).　We　found　that　spiking　during　SWRs　is　rhythmically　organized　with　higher　event-to-event　variability　than　spiking　during　locomotion-associated　population　events.　Decoding　analyses　using　clusterless　methods　further　indicate　that　a　similar　spatial　experience　can　be　replayed　in　multiple　SWRs,　each　time　with　a　different　rhythmic　structure　whose　periodicity　is　sampled　from　a　log-normal　distribution.　This　variability　increases　with　experience　despite　the　decline　in　SWR　rates　that　occurs　as　environments　become　more　familiar.　We　hypothesize　that　the　variability　in　temporal　organization　of　hippocampal　spiking　provides　a　mechanism　for　storing　experiences　with　various　degrees　of　specificity.