Flere end 1 ud af 10 Færre end 1 ud af 10 men flere end 1 ud af 100 Færre end 1 ud af 100 men flere end 1 ud af 1000 Færre end 1 ud af 1000
Very common: more than 1 per 10 Common: less than 1 per 10 but more than 1 per 100 Uncommon: less than 1 per 100 but more than 1 per 1000 Rare: less than 1 per 1000