| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| open access textbook database | 0.83 | 0.8 | 5081 | 87 | 29 |
| open | 1.94 | 0.9 | 1754 | 32 | 4 |
| access | 1.32 | 0.2 | 224 | 36 | 6 |
| textbook | 0.06 | 0.7 | 3276 | 43 | 8 |
| database | 0.13 | 0.4 | 428 | 4 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| open access textbook database | 1.16 | 0.8 | 5687 | 77 |
