| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| when were musical instruments invented | 1.49 | 1 | 1622 | 40 | 38 |
| when | 1.8 | 0.3 | 3412 | 25 | 4 |
| were | 0.2 | 0.4 | 9148 | 26 | 4 |
| musical | 1.84 | 0.4 | 3856 | 7 | 7 |
| instruments | 1.38 | 0.8 | 3882 | 44 | 11 |
| invented | 1.19 | 0.9 | 8926 | 80 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| when were musical instruments invented | 0.79 | 0.2 | 556 | 86 |
