No | Pattern | Freq | Relations |
---|---|---|---|
1 | [noun] [prep] a [adj] period [prep] | 345 | |
2 | [noun] [prep] a [adj] period [prep] | 328 | |
3 | [noun] [prep] a long [noun] [prep] | 299 | |
4 | [noun] [prep] a long period [prep] | 81 | |
5 | [noun] [prep] [art] long period [prep] | 77 | |
6 | [noun] [prep] a long period [prep] | 71 |