SN4 ""

No	Pattern	Freq
1	[noun] at the time	2743
2	[noun sg] at the time	1828
3	[verb] at the time	1393
4	[adj] at the time	836
5	[vb pp] at the time	656
6	[adj] at the time	613
7	[noun pl] at the time	517
8	[adv] at the time	491
9	[conj] at the time	415
10	[pron] at the time	408
11	[noun prp] at the time	352
12	[vb past] at the time	331
13	[adv] at the time	323
14	[pers pn] at the time	276
15	[coord] at the time	194
16	[v-ing] at the time	190
17	[num] at the time	142
18	[be] at the time	138
19	be at the time	138
20	[adv prt] at the time	129
21	[subord] at the time	118
22	but at the time	111
23	but at the time	111
24	that at the time	103
25	[that] at the time	103
26	that at the time	103
27	[was/were] at the time	102
28	it at the time	99
29	it at the time	99
30	[vb infin] at the time	80