This is the 138th most frequent Greek word.
μήνα
The Greek word "μήνα" means "month."
In this sentence, the word 'μήνα' refers to a duration of time, specifically 'a month' as an increment of time measure.
Έμεινα στην Αθήνα για έναν μήνα.
I stayed in Athens for a month.
Here, 'μήνας' (using a different case form 'μήνα') signifies 'a month' as a division within a calendar year.
Ο Ιανουάριος είναι ο πρώτος μήνας του έτους.
January is the first month of the year.
In this question, 'μήνας' is used to signify 'a month' in the context of discussing preferences about time periods within the year.