SN4 ""

No	Pattern	Freq
1	[noun] [prep] 40 years	88
2	[noun sg] [prep] 40 years	57
3	[verb] [prep] 40 years	32
4	[adj] [prep] 40 years	23
5	[vb pp] [prep] 40 years	20
6	[noun pl] [prep] 40 years	16
7	[noun prp] [prep] 40 years	14
8	[adv] [prep] 40 years	13
9	[num] [prep] 40 years	13
10	[conj] [prep] 40 years	8
11	[adv] [prep] 40 years	8
12	[adj] [prep] 40 years	6
13	30 [prep] 40 years	5
14	time [prep] 40 years	5
15	[adv prt] [prep] 40 years	5
16	30 [prep] 40 years	5
17	[prep] [adv] 40 years	59
18	[prep] [adv] 40 years	59
19	[prep] over 40 years	26
20	[prep] over 40 years	26
21	[prep] nearly 40 years	18
22	[prep] nearly 40 years	18
23	[prep] [noun] 40 years	7
24	[prep] [noun prp] 40 years	6
25	[prep] [det] 40 years	6
26	[prep] [adj] 40 years	6
27	[prep] the 40 years	5
28	[prep] [art] 40 years	5
29	[prep] [pron] 40 years	5
30	[prep] [art] 40 years	5