| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [art] period [prep] | 233 |
|
| 2 | be [art] period [prep] | 233 |
|
| 3 | [be] [art] period of | 180 |
|
| 4 | [be] a period [prep] | 179 |
|
| 5 | [be] a period [prep] | 179 |
|
| 6 | [was/were] [art] period [prep] | 109 |
|
| 7 | was [art] period [prep] | 95 |
|
| 8 | [is] [art] period [prep] | 62 |
|
| 9 | is [art] period [prep] | 55 |
|
| 10 | [be] the period [prep] | 51 |
|
| 11 | [be] the period [prep] | 51 |
|
| 12 | [be] [art] period [prep] | 42 |
|
| 13 | be [art] period [prep] | 42 |
|
| 14 | [be] [art] period in | 20 |
|
| 15 | been [art] period [prep] | 15 |
|
| 16 | [been] [art] period [prep] | 15 |
|
| 17 | were [art] period [prep] | 14 |
|
| 18 | [be] [art] period during | 11 |
|
| 19 | [be] [art] period between | 9 |
|
| 20 | 's [art] period [prep] | 7 |
|
