No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] [adv] [prep] a time | 21 | |
2 | [prep] [adv] [prep] a time | 21 | |
3 | [prep] [adv] for a time | 16 | |
4 | at [adv] [prep] a time | 16 | |
5 | at [adv] [prep] a time | 16 | |
6 | [prep] least [prep] a time | 15 | |
7 | [prep] least [prep] a time | 15 |