SN4 ""

No	Pattern	Freq
1	[verb] until a	99
2	[noun] until a	74
3	[vb pp] until a	61
4	[noun sg] until a	58
5	[adv] until a	28
6	[vb infin] until a	13
7	[adj] until a	12
8	[vb past] until a	11
9	[adv prt] until a	10
10	[not/n't] until a	10
11	[noun pl] until a	10
12	not until a	10
13	[pron] until a	9
14	[v-ing] until a	8
15	not until a	7
16	[adv] until a	7
17	[adj] until a	7
18	[noun prp] until a	6
19	[pers pn] until a	5
20	[conj] until a	5
21	until [adv] a	42
22	until [adv] a	42
23	until recently a	20
24	until recently a	20
25	until [adj] a	15
26	until [det] a	8
27	until [v-ing] a	7
28	until [num] a	7
29	until [verb] a	7
30	until such a	5