SN4 ""

No	Pattern	Freq
1	[adj] [noun pl] over a [adj] period	49
2	[adj] [noun pl] over a [adj] period	34
3	[noun] [noun pl] over a [adj] period	18
4	[prep] [noun pl] over a [adj] period	17
5	[prep] [noun pl] over a [adj] period	17
6	[noun sg] [noun pl] over a [adj] period	15
7	of [noun pl] over a [adj] period	11
8	of [noun pl] over a [adj] period	11
9	the [noun pl] over a [adj] period	10
10	[art] [noun pl] over a [adj] period	10
11	[art] [noun pl] over a [adj] period	10
12	the [noun pl] over a [adj] period	10
13	[num] [noun pl] over a [adj] period	9
14	[verb] [noun pl] over a [adj] period	5
15	[noun pl] [verb] over a [adj] period	5
16	[noun pl] [vb pp] over a [adj] period	5
17	[noun pl] over a [adj] [noun] period	34
18	[noun pl] over a [adj] [noun sg] period	34
19	[noun pl] over a [adj] year period	17
20	[noun pl] over a [adj] year period	17
21	[noun pl] over a [adj] month period	5
22	[noun pl] over a [adj] month period	5
23	[noun pl] over a [adj] period [prep]	26
24	[noun pl] over a [adj] period [prep]	26
25	[noun pl] over a [adj] period of	20
26	[noun pl] over a [adj] period of	20
27	[noun pl] over a [adj] period [verb]	7
28	[noun pl] over a [adj] period [modal v]	5
29	[noun pl] over a [adj] period [vb mod]	5