SN4 ""

No	Pattern	Freq
1	the [noun sg] when	2356
2	the time when	767
3	the day when	303
4	the moment when	262
5	the year when	130
6	the period when	100
7	the date when	84
8	the morning when	73
9	the war when	53
10	the evening when	48
11	the night when	45
12	the afternoon when	44
13	the summer when	40
14	the season when	37
15	the past when	35
16	the week when	34
17	the winter when	23
18	the weekend when	20
19	the stage when	20
20	the future when	19
21	the month when	17
22	the century when	17
23	the hour when	12
24	the spring when	12
25	the autumn when	10
26	the case when	9
27	the decade when	9
28	the interval when	7
29	the meeting when	7
30	the era when	6