| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| natural frequency rotational system | 0.35 | 0.9 | 37 | 29 | 35 |
| natural | 0.57 | 0.6 | 6043 | 94 | 7 |
| frequency | 0.76 | 0.1 | 8078 | 31 | 9 |
| rotational | 0.37 | 0.3 | 5985 | 82 | 10 |
| system | 0.65 | 0.7 | 3039 | 90 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| natural frequency rotational system | 0.76 | 0.4 | 4503 | 25 |
