| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| sudoku hard billions of free | 1.18 | 1 | 5583 | 41 |
| sudoku billions free online hard | 1.43 | 0.6 | 9752 | 93 |
| billions of free sudoku to play online | 1.89 | 1 | 7173 | 54 |
| sudoku - billions free and easy | 0.27 | 0.4 | 3999 | 15 |
| billions of free sudoku puzzles | 0.16 | 0.5 | 5190 | 50 |
| sudoku billions free online | 1.57 | 0.8 | 5435 | 52 |
| web sudoku hard billions | 0.12 | 0.6 | 4360 | 42 |
| billions of sudoku online | 0.25 | 0.1 | 844 | 51 |
| sudoku free online billion | 0.23 | 0.1 | 923 | 37 |
| sudoku easy billions of games | 1.22 | 0.1 | 4111 | 5 |
| sudoku billions free medium | 1.32 | 0.4 | 3269 | 55 |
| one billion free sudoku | 0.46 | 0.7 | 7428 | 6 |
| sudoku by the billions | 1.08 | 0.2 | 7210 | 3 |
| sudoku online web billions free | 0.39 | 0.7 | 2486 | 60 |
| billions of free web sudoku | 0.36 | 0.8 | 3109 | 18 |
