This is the 4763rd most frequent Russian word.
занималась
"Engaged in" or "was occupied with."
The word "занималась" here means "was engaged in" or "was practicing" in the context of performing a physical activity like sports.
Она занималась спортом каждый день.
She was doing sports every day.
In this sentence, "занималась" implies "was occupied with" or "was practicing," referring to activities related to playing musical instruments or studying music.
Вчера я занималась музыкой, играя на гитаре.
Yesterday, I was practicing music by playing the guitar.
Here, "занималась" means "was engaged in" or "was occupied with," denoting that her activity consisted of reading a book.