spain – Dubai 90 Day Visa as EU / Spanish Citizen

I would like some help to understand my correct situation related to the 90 day visa stay in the UAE in my case in Dubai.
I entered the country for the first time in November 2020, and stayed for 30 days. I then flew back to Spain and stayed in Spain for 3 months.
I have now come back to Dubai on the 15th of march to stay for some time until I get me self sorted to live here permanently.
My question is – Ive read online that we have 90 day stay within a 180 day period.
If I visited the country for the first time on the 15th of November 2020, so the period of 180 days from first entry would be until end of May 2021.
Ive come back to Dubai on the 15th of March 2021, so would I have to leave the country when my remaining 60 days are over? Or is this considered a new entry for 90 days?

I would really appreciate any help on this matter.

Thank you in advance