| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| historical maps of china | 1.55 | 0.3 | 3421 | 45 | 24 |
| historical | 1.14 | 0.6 | 1482 | 71 | 10 |
| maps | 1.06 | 0.1 | 7109 | 83 | 4 |
| of | 0.6 | 0.3 | 7165 | 16 | 2 |
| china | 0.66 | 1 | 1966 | 23 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| historical maps of china | 1.83 | 1 | 5713 | 34 |
