| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| when were rockets invented | 0.62 | 0.1 | 6420 | 88 | 26 |
| when | 1.2 | 0.8 | 3061 | 42 | 4 |
| were | 1.28 | 0.5 | 8643 | 76 | 4 |
| rockets | 1.73 | 0.8 | 3569 | 72 | 7 |
| invented | 1.16 | 0.8 | 6718 | 1 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| when were rockets invented | 0.2 | 0.1 | 6338 | 98 |
