Честотите се определят като много чести (≥ 1/ 10), чести (≥ 1/ 100 дo < 1/ 10) или нечести (≥ 1/ 1 000 дo < 1/ 100).
Frequencies are defined as very common (≥ 1/ 10), common (≥ 1/ 100, < 1/ 10) or uncommon (≥ 1/ 1,000, < 1/ 100).