Много чести (≥1/ 10); чести (≥1/ 100, < 1/ 10); нечести (≥1/ 1 000, < 1/ 100); редки (≥1/ 10 000, < 1/ 1 000); много редки (< 1/ 10 000).
Very common (≥ 1/ 10); common (≥ 1/ 100, < 1/ 10); uncommon (≥ 1/ 1,000, < 1/ 100); rare (≥ 1/ 10,000, < 1/ 1,000); very rare (< 1/ 10,000).