SN4 ""

No	Pattern	Freq
1	[noun] at a time when [noun]	107
2	[noun sg] at a time when [noun]	67
3	[verb] at a time when [noun]	59
4	[noun pl] at a time when [noun]	26
5	[adj] at a time when [noun]	23
6	come at a time when [noun]	23
7	[vb pp] at a time when [noun]	19
8	[vb -s] at a time when [noun]	16
9	[adv] at a time when [noun]	15
10	comes at a time when [noun]	13
11	[conj] at a time when [noun]	13
12	[adv] at a time when [noun]	12
13	[adj] at a time when [noun]	12
14	[coord] at a time when [noun]	12
15	[vb past] at a time when [noun]	12
16	[noun prp] at a time when [noun]	10
17	and at a time when [noun]	9
18	and at a time when [noun]	9
19	[det] at a time when [noun]	7
20	[be] at a time when [noun]	7
21	be at a time when [noun]	7
22	came at a time when [noun]	7
23	this at a time when [noun]	6
24	[was/were] at a time when [noun]	6
25	this at a time when [noun]	6
26	was at a time when [noun]	6
27	[to-vb] at a time when [noun]	5
28	at a time when [art] [noun]	265
29	at a time when [art] [noun]	265
30	at a time when the [noun]	252