GV$REDO_DEST_RESP_HISTOGRAM definition in Oracle Database 11.2
GV$REDO_DEST_RESP_HISTOGRAM
select
inst_id, -- INST_ID NUMBER
DEST_ID, -- DEST_ID NUMBER
TIME, -- TIME VARCHAR2(20)
DURATION, -- DURATION NUMBER
FREQUENCY -- FREQUENCY NUMBER
from
x$kcrrnhg