| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system of central | 20 |
|
| 2 | polytechnic of central | 20 |
|
| 3 | area of central | 19 |
|
| 4 | director of central | 16 |
|
| 5 | part of central | 12 |
|
| 6 | role of central | 11 |
|
| 7 | sort of central | 11 |
|
| 8 | number of central | 11 |
|
| 9 | degree of central | 9 |
|
| 10 | form of central | 9 |
|
| 11 | kind of central | 8 |
|
| 12 | edition of central | 7 |
|
| 13 | lack of central | 7 |
|
| 14 | university of central | 7 |
|
| 15 | whole of central | 6 |
|
| 16 | chairman of central | 5 |
|
| 17 | president of central | 5 |
|
| 18 | head of central | 5 |
|
| 19 | group of central | 5 |
|
| 20 | meeting of central | 5 |
|
| 21 | instrument of central | 5 |
|
