This is the 106th most frequent Indonesian word.
musim
Season.
In this sentence, 'musim' refers to a specific time of year characterized by periodic weather patterns, namely the rainy season.
Musim hujan biasanya berlangsung dari bulan November hingga Maret.
The rainy season usually lasts from November to March.
Here, 'musim' is used to indicate a period when a certain fruit, durian, is abundantly in season and available.
Musim durian tiba, banyak pedagang menjual durian di sepanjang jalan.
The durian season has arrived; many vendors are selling durians along the street.
In this context, 'musim' refers to a scheduled period of activities, specifically the football match league period.