Hi :) Well it is not very clear If u could provide me the source from where you heard this word I would be able to help you better. But Yes in Urdu and Hindi we use the word (A'rsaa) - عرصہ Meaning - Period, Time, Interval. Eg. - Mujhey maa ko miley ek arsah ho gaya hai = It has been a while since I met mother. Another common phrase involving Arsaa is Arsaa Lagana - To Delay, or to take a long time Eg. Tumne tayaar hone mein arsaa laga diya - You took so long to get ready. Another phrase is Arse Se - From a long time Eg. Woh arse se beemar tha - He was ill from a long time. Hope it helps :)

Simply ........ Aarsa means a time period or a time gap between two events.

Aarse is a Urdu word- For Eg: If you not met your cousin for a Long Time and then you suddendly meet her then you you would phrase it as Hum dono bahut aarse ke baad mile.

aarse meaning: we use it in time for long time. if someone did not saw since longtime. we will call it like this, "aap bahut lambe aarse se nahi dikhai diye."