SN4 ""

No	Pattern	Freq
1	[prep] the time when	541
2	[prep] the time when	498
3	at the time when	265
4	to the time when	63
5	[prep] the times when	43
6	of the time when	36
7	from the time when	35
8	for the time when	25
9	about the time when	23
10	during the time when	11
11	in the time when	9
12	as the time when	8
13	between the time when	7
14	like the time when	7
15	since the time when	7
16	around the time when	6
17	until the time when	5
18	with the time when	5