| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| gutenberg project audio books free | 0.54 | 0.7 | 6840 | 65 |
| gutenberg project audio books free download | 1.11 | 0.3 | 5636 | 83 |
| free audio books online project gutenberg | 0.37 | 1 | 7272 | 29 |
| gutenberg audio books free download | 1.39 | 1 | 6446 | 20 |
| microsoft gutenberg audio books | 1.79 | 0.3 | 681 | 30 |
| free downloadable books on project gutenberg | 1.82 | 0.6 | 3403 | 28 |
| project gutenberg open audiobook collection | 1.72 | 1 | 3925 | 27 |
| free books project gutenberg | 1.38 | 0.2 | 6860 | 75 |
| read free books project gutenberg | 1.54 | 1 | 7144 | 32 |
| books free online project gutenberg | 0.56 | 0.5 | 5959 | 95 |
| downloadable books on project gutenberg | 1.94 | 0.4 | 8817 | 66 |
| free audiobook websites project gutenberg | 1.16 | 0.6 | 5378 | 64 |
