| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| billions of sudoku hard | 0.05 | 1 | 976 | 100 | 23 |
| billions | 1.85 | 0.1 | 2572 | 85 | 8 |
| of | 0.06 | 0.1 | 3423 | 69 | 2 |
| sudoku | 1.69 | 0.9 | 8545 | 79 | 6 |
| hard | 0.8 | 0.9 | 5310 | 19 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| billions of sudoku hard | 0.41 | 1 | 6786 | 49 |
| sudoku billions free online hard | 1.79 | 1 | 555 | 65 |
| sudoku hard billions of free | 1.54 | 0.9 | 4916 | 50 |
| web sudoku hard billions | 1.46 | 0.9 | 6137 | 6 |
| sudoku online hard billions | 1.61 | 0.8 | 4726 | 90 |
| sudoku billions free sudoku puzzles | 1.76 | 0.1 | 4440 | 91 |
| billions of free sudoku | 1.15 | 0.3 | 1754 | 36 |
| billions sudoku play online | 0.48 | 0.3 | 8642 | 31 |
