| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] [prep] several | 196 |
|
| 2 | [been] [vb pp] by several | 53 |
|
| 3 | [been] [vb pp] in several | 52 |
|
| 4 | [been] [vb pp] on several | 25 |
|
| 5 | [been] [vb pp] for several | 24 |
|
| 6 | [been] [vb pp] to several | 12 |
|
| 7 | [been] [vb pp] at several | 9 |
|
| 8 | [been] [vb pp] from several | 6 |
|
| 9 | [been] used [prep] several | 6 |
|
| 10 | [been] studied [prep] several | 5 |
|
| 11 | [been] reported [prep] several | 5 |
|
| 12 | [been] made [prep] several | 5 |
|
| 13 | [been] found [prep] several | 5 |
|
| 14 | [been] shown [prep] several | 5 |
|
