SN4 ""

No	Pattern	Freq
1	[noun pl] [prep] the [adj] period	395
2	[noun pl] [prep] the [adj] period	276
3	[noun pl] in the [adj] period	115
4	[noun pl] in the [adj] period	115
5	[noun pl] of the [adj] period	108
6	[noun pl] of the [adj] period	108
7	[noun pl] [prep] the [det] period	76
8	[noun pl] [prep] the same period	76
9	[noun pl] [prep] the same period	76
10	[noun pl] during the [adj] period	56
11	[noun pl] during the [adj] period	56
12	[noun pl] over the [adj] period	41
13	[noun pl] over the [adj] period	41
14	[noun pl] for the [adj] period	31
15	[noun pl] for the [adj] period	31
16	[noun pl] [prep] the post-war period	26
17	[noun pl] [prep] the post-war period	26
18	[noun pl] [prep] the inter-war period	21
19	[noun pl] [prep] the inter-war period	21
20	[noun pl] [prep] the [num ord] period	18
21	[noun pl] from the [adj] period	15
22	[noun pl] from the [adj] period	15
23	[noun pl] [prep] the [num] period	14
24	[noun pl] [prep] the second period	9
25	[noun pl] [prep] the second period	9
26	changes [prep] the [adj] period	9
27	[noun pl] [prep] the modern period	8
28	[noun pl] into the [adj] period	8
29	[noun pl] into the [adj] period	8
30	[noun pl] [prep] the [adj -er] period	8