V$FS_FAILOVER_HISTOGRAM definition in Oracle Database 11.2
V$FS_FAILOVER_HISTOGRAM
select
REDO_LATENCY, -- REDO_LATENCY NUMBER
FREQUENCY, -- FREQUENCY NUMBER
LAST_TIME -- LAST_TIME VARCHAR2(20)
from
GV$FS_FAILOVER_HISTOGRAM
where
inst_id=USERENV('Instance')