No | Pattern | Freq | Relations |
---|---|---|---|
1 | a fixed period [prep] [noun] | 23 | |
2 | a fixed period [prep] [noun] | 23 | |
3 | a fixed period [prep] [noun sg] | 23 | |
4 | a fixed period of [noun] | 21 | |
5 | a fixed period of [noun] | 21 | |
6 | a fixed period [prep] time | 18 | |
7 | a fixed period [prep] time | 18 |