| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] a [noun] of | 2219 |
|
| 2 | be [vb pp] [prep] a [noun sg] of | 2085 |
|
| 3 | [be] [vb pp] [prep] a period of | 132 |
|
| 4 | be [vb pp] [prep] a period of | 132 |
|
| 5 | be [vb pp] [prep] [art] period of | 60 |
|
| 6 | be [vb pp] [prep] [art] period of | 60 |
|
| 7 | be [vb pp] [prep] a period [prep] | 54 |
|
| 8 | be [verb] [prep] a period of | 52 |
|
| 9 | [be] [vb pp] [prep] a period of | 50 |
|
| 10 | be [vb pp] [prep] a period of | 50 |
|
| 11 | be [vb pp] [prep] a period of | 50 |
|
| 12 | be [vb pp] [prep] a period of | 50 |
|
