| Category | Data source | Number of documents used | Number of morphemes used | Number of co-occurrence relationships | |
|---|---|---|---|---|---|
| Central government | China legal retrieval system | 66 | 3,150 | 17,708 | |
| Local government | Eastern region | 61 | 4,422 | 27,560 | |
| Central region | 29 | 2,032 | 9,373 | ||
| Western region | 25 | 1,723 | 6,729 | ||
| Total | 189 (66/123) | 11,327 | 144,955 | ||