This is the 13189th most frequent Swedish word.
torsdagar
Thursdays.
The word 'torsdag' is used in its singular form here, indicating the specific day Thursday in the weekly cycle.
Vi går till stan varje torsdag.
We go to town every Thursday.
The word 'torsdagar' is in its plural form here, referring to Thursdays generally as recurring days in weeks.
På torsdagar brukar det vara marknad på torget.
On Thursdays, there usually is a market at the square.
The word 'torsdagskvällarna' combines 'torsdagar' (Thursdays in plural) with 'kvällarna' (evenings in plural), referring to Thursday evenings in general or specifically over a period of time.