| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [adv prt] over a period | 10 |
|
| 2 | be [vb pp] [adv] over a period | 7 |
|
| 3 | be built [adv] over a period | 5 |
|
| 4 | be [vb pp] up over a period | 5 |
|
| 5 | be [vb pp] up over a period | 5 |
|
