No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a [adv] long period [prep] | 12 | |
2 | [prep] a [adv] long period of | 11 | |
3 | [prep] a [adv] long period [prep] | 8 | |
4 | for a [adv] long period [prep] | 7 | |
5 | over a [adv] long period [prep] | 5 |
[prep] a [adv] long period [prep] Next page
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