| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] by a period of | 29 |
|
| 2 | [vb pp] by a period of | 29 |
|
| 3 | follow by a period of | 15 |
|
| 4 | followed by a period of | 15 |
|
| 5 | by a [adj] period of | 11 |
|
| 6 | by a [adj] period of | 10 |
|
| 7 | by a period of [adj] | 18 |
|
| 8 | by a period of [adj] | 18 |
|
| 9 | by a period of [noun] | 15 |
|
| 10 | by a period of [noun sg] | 15 |
|
