Много чести > 1/ 10; Чести > 1/ 100 дo < 1/ 10; Нечести > 1/ 1 000 дo < 1/ 100; Редки > 1/ 10 000 дo < 1/ 1 000; Много редки < 1/ 10 000.
Very common > 1/ 10; Common > 1/ 100 to < 1/10; Uncommon > 1/1000 to< 1/100; Rare > 1/10,000 to < 1/ 1000; Very rare < 1/10,000.