SN4 ""

No	Pattern	Freq
1	[prep] a week [conj] [adv]	89
2	[prep] a week [conj] [adv]	89
3	[noun] a week [conj] [adv]	63
4	for a week [conj] [adv]	58
5	for a week [conj] [adv]	58
6	[adv] a week [conj] [adv]	54
7	[adv] a week [conj] [adv]	51
8	[noun pl] a week [conj] [adv]	27
9	[verb] a week [conj] [adv]	22
10	once a week [conj] [adv]	21
11	once a week [conj] [adv]	21
12	[noun sg] a week [conj] [adv]	18
13	[n mass] a week [conj] [adv]	13
14	in a week [conj] [adv]	11
15	in a week [conj] [adv]	11
16	after a week [conj] [adv]	10
17	after a week [conj] [adv]	10
18	[conj] a week [conj] [adv]	8
19	about a week [conj] [adv]	7
20	only a week [conj] [adv]	7
21	pound a week [conj] [adv]	7
22	about a week [conj] [adv]	7
23	only a week [conj] [adv]	7
24	twice a week [conj] [adv]	6
25	day a week [conj] [adv]	6
26	twice a week [conj] [adv]	6
27	[vb infin] a week [conj] [adv]	6
28	days a week [conj] [adv]	6
29	be a week [conj] [adv]	5
30	[noun prp] a week [conj] [adv]	5