Много чести (≥1/ 10) Чести (≥1/ 100 до < 1/ 10) Нечести (≥1/ 1 000 дo < 1/ 100) Редки (≥1/ 10 000 дo < 1/ 1 000) Много редки (< 1/ 10 000) С неизвестна честота (от наличните данни не може да бъде направена оценка)
Very common (≥ 1/ 10) Common (≥ 1/ 100 to < 1/ 10) Uncommon (≥ 1/ 1,000 to < 1/ 100) Rare (≥ 1/ 10,000 to < 1/ 1,000) Very rare (< 1/ 10,000) Not known (cannot be estimated from the available data)