Meget almindelig (≥1/ 10) Almindelig (≥1/ 100 til, < 1/ 10) Ikke almindelig (≥1/ 1. 000 til, < 1/ 100) Sjælden (≥1/ 10. 000 til, < 1/ 1. 000) Meget sjælden (< 1/ 10. 000), ikke kendt (kan ikke estimeres ud fra forhåndenværende data)
Frequency is defined using the following convention: 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).