I saw a time lapse on yt where the plant owner placed the potted plant into a large tub on water and showed how the pot sucks in the water, causing the water level to drop slowly.
I have several big 50 liter plant pots with Ficus Benjamini and other subtropical plants that I water every 4-6 weeks with around 2 litres per pot. So far they survived like this for around 15 years.