Frequencies are defined as 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)
Esinemissagedus on defineeritud järmiselt: väga sage (≥1/ 10), sage (≥1/ 100 kuni < 1/ 10), aeg- ajalt (≥1/ 1000 kuni < 1/ 100), harv (≥1/ 10 000 kuni < 1/ 1000), väga harv (< 1/ 10 000), teadmata (ei saa hinnata olemasolevate andmete alusel).