SN4 ""

No	Pattern	Freq
1	[prep] a series of [noun] [prep]	427
2	[prep] a series of [noun] [prep]	427
3	[prep] a series of [noun pl] [prep]	420
4	in a series of [noun] [prep]	129
5	[prep] a series of [noun] in	94
6	of a series of [noun] [prep]	70
7	[prep] a series of [noun] on	63
8	[prep] a series of [noun] of	45
9	with a series of [noun] [prep]	38
10	[prep] a series of [noun] with	38
11	by a series of [noun] [prep]	31
12	[prep] a series of [noun] by	30
13	for a series of [noun] [prep]	25
14	to a series of [noun] [prep]	25
15	[prep] a series of [noun] at	23
16	[prep] a series of meetings [prep]	21
17	[prep] a series of meeting [prep]	21
18	after a series of [noun] [prep]	21
19	[prep] a series of [noun] to	20
20	[prep] a series of [noun] for	19
21	[prep] a series of article [prep]	18
22	[prep] a series of articles [prep]	18
23	[prep] a series of [noun] about	16
24	as a series of [noun] [prep]	16
25	[prep] a series of [noun] from	16
26	on a series of [noun] [prep]	14
27	[prep] a series of [noun] between	14
28	through a series of [noun] [prep]	12
29	[prep] a series of attacks [prep]	12
30	from a series of [noun] [prep]	12