SN4 ""

No	Pattern	Freq
1	[noun] which at the time	20
2	[noun sg] which at the time	16
3	which [verb] at the time	12
4	which [vb past] at the time	9
5	which at the same time	21
6	which at the [det] time	21
7	which at the same time	21
8	which at the [adj] time	21
9	which at the time [verb]	20
10	which at the time [vb past]	20
11	which at the time [be]	17
12	which at the time be	17
13	which at the time [was/were]	16
14	which at the time was	16
15	which at the time [prep]	12
16	which at the time of	12
17	which at the time [prep]	12
18	which at the time of	12
19	which at the time [pron]	5
20	which at the time [pers pn]	5