SN4 ""

No	Pattern	Freq
1	[noun] at the time	2756
2	[noun sg] at the time	1835
3	[verb] at the time	1400
4	[adj] at the time	840
5	[vb pp] at the time	657
6	[adj] at the time	617
7	[noun pl] at the time	521
8	[adv] at the time	496
9	[conj] at the time	416
10	[pron] at the time	412
11	[noun prp] at the time	353
12	[vb past] at the time	332
13	[adv] at the time	326
14	[pers pn] at the time	279
15	[coord] at the time	194
16	[v-ing] at the time	192
17	[num] at the time	142
18	be at the time	139
19	[be] at the time	139
20	[adv prt] at the time	131
21	[subord] at the time	119
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	100
29	it at the time	100
30	[vb infin] at the time	82