SN4 ""

No	Pattern	Freq
1	[noun] [prep] four years	324
2	[noun sg] [prep] four years	251
3	[noun] for four years	157
4	[noun] of four years	60
5	[noun] in four years	53
6	[noun pl] [prep] four years	34
7	[noun prp] [prep] four years	31
8	time [prep] four years	17
9	period [prep] four years	16
10	period [prep] four years	16
11	time [prep] four years	15
12	[noun] after four years	13
13	[noun] to four years	12
14	month [prep] four years	10
15	[noun] within four years	10
16	[n mass] [prep] four years	8
17	month [prep] four years	6
18	year [prep] four years	6
19	age [prep] four years	5
20	year [prep] four years	5
21	age [prep] four years	5