No | Pattern | Freq | Relations |
---|---|---|---|
1 | [vb pp] [adv] [prep] a long [noun] | 61 | |
2 | [vb pp] [adv] [prep] a long [noun sg] | 59 | |
3 | [vb pp] [adv] [prep] a [adj] period | 42 | |
4 | [verb] [adv] [prep] a long period | 21 | |
5 | [vb pp] [adv] [prep] a long period | 9 | |
6 | [vb pp] [adv] [prep] [art] long period | 9 |