Честотите се определят като много чести (≥1/ 10), чести (≥1/ 100 до < 1/ 10) и нечести (≥1/ 1000 до < 1/ 100).
Frequencies are defined as very common (≥ 1/ 10), common (≥ 1/ 100 to < 1/ 10) and uncommon (≥ 1/ 1000 to < 1/ 100).