input: [0] f.{fieldname}.interval [2] Possible values are minute, hour, day, week, month, quarter, year [3] Sets the date histogram period for date field faceting [1] 
output: No default value
options: D e f a u l t V a l u e
options: o n
options: N o d e f a u l t f i e l d
options: 1 0
options: N o d e f a u l t v a l u e