| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is usually [vb pp] to | 132 |
|
| 2 | is usually referred to | 22 |
|
| 3 | is usually refer to | 22 |
|
| 4 | is usually confined to | 9 |
|
| 5 | is usually confine to | 9 |
|
| 6 | is usually attribute to | 8 |
|
| 7 | is usually considered to | 8 |
|
| 8 | is usually attributed to | 8 |
|
| 9 | is usually consider to | 8 |
|
| 10 | is usually restricted to | 7 |
|
| 11 | is usually restrict to | 7 |
|
| 12 | is usually limit to | 6 |
|
| 13 | is usually limited to | 6 |
|
| 14 | is usually assume to | 5 |
|
| 15 | is usually assumed to | 5 |
|
