| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| bulgarian history books | 0.51 | 0.5 | 6996 | 67 | 23 |
| bulgarian | 1.72 | 0.3 | 1816 | 82 | 9 |
| history | 1.24 | 0.3 | 1514 | 86 | 7 |
| books | 1.54 | 0.5 | 9360 | 49 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| bulgaria history books | 1.5 | 0.8 | 3714 | 99 |
| bulgarian books history | 1.2 | 0.5 | 641 | 45 |
| bulgarian history book | 0.34 | 0.8 | 9629 | 48 |
