Hideout

Hi all
What is the chance of a hideout appearing on the map? Does the rarity of the maps, the influence of the elder or the shaper, or corrupted affect this?
Passed more than 150 terrace maps and nothing

P.S. Use google translate, sorry

https://poedb.tw/us/Hideout#Hideouts

Extremely rare is about 1000 maps as far as i know. Nothing affects it's spawn chance