Does a (6) in the (online) timetables of specific bus lines mean that the bus goes *only* on Saturdays at that time or on other days of the week too? SAD Humenné, SAD Prešov

I am from Poland, not too far from the border and I wanted to use a certain local Slovak bus line. The only available days on the Polish side were monday-friday because the ones that go close to the border are quite sparse and I wanted to check buses on the Slovak side.

I found an hour that matched the plans fairly well on SAD Humenné, but there is a (6) at the top (in the image).

The 66 below is about it not driving on a specific date that doesn't concern me.

In case this only goes on Saturdays, I would like to know if it's the same for SAD Prešov, because their buses go on the route I need too, just at different times.