so, this one will give you the _time but only for the last 24 hours:
| multisearch
[ search index=_internal sourcetype=splunkd earliest=-2w@-24h@h latest=-2w@-0h@h
| eval event="1", when="then" ]
[ search index=_internal sourcetype=splunkd earliest=-24h@h latest=-0h@h
| eval event="1", when="now" ]
| bin _time span=1h
| fields event when date_hour
| chart sum(event) AS events values(_time) AS _time over date_hour by when
| where 'events: now' > 'events: then' | table "VALUE_time: now" events* | rename "VALUE_time: now" AS _time
the events represented by then are in the same hour just two weeks earlier in this example.
cheers, MuS
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