SN4 ""

No	Pattern	Freq
1	[verb] [not/n't] at the time	10
2	[vb past] [not/n't] at the time	9
3	be [not/n't] at the time	8
4	[be] [not/n't] at the time	8
5	did [not/n't] at the time	7
6	do [not/n't] at the time	7
7	[was/were] [not/n't] at the time	7
8	was [not/n't] at the time	6
9	[not/n't] [verb] at the time	82
10	[not/n't] [vb infin] at the time	40
11	[not/n't] [adj] at the time	35
12	[not/n't] [vb pp] at the time	35
13	[not/n't] [adj] at the time	35
14	[not/n't] know at the time	19
15	[not/n't] [adv] at the time	14
16	[not/n't] know at the time	14
17	[not/n't] [adv] at the time	14
18	[not/n't] available at the time	9
19	[not/n't] realise at the time	9
20	[not/n't] available at the time	9
21	[not/n't] [v-ing] at the time	7
22	[not/n't] realise at the time	7
23	[not/n't] there at the time	6
24	[not/n't] there at the time	6
25	[not/n't] at the [adj] time	17
26	[not/n't] at the [det] time	15
27	[not/n't] at the same time	15
28	[not/n't] at the same time	15
29	[not/n't] at the time [prep]	11
30	[not/n't] at the time of	11