| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period of [adj] [noun pl] [pers pn] [verb] | 12 |
|
| 2 | period [prep] [adj] [noun pl] [pers pn] [verb] | 12 |
|
| 3 | period [prep] [adj] [noun pl] [pers pn] [verb] | 12 |
|
| 4 | period of [adj] [noun pl] [pers pn] [verb] | 12 |
|
| 5 | period [prep] [num] [noun pl] [pers pn] [verb] | 11 |
|
| 6 | period [prep] [adj] years [pers pn] [verb] | 9 |
|
| 7 | period [prep] [adj] [noun pl] [pers pn] [vb past] | 9 |
|
